Include fx, req, recover if in actual when

dist/sigpro.esm.js

@@ -231,15 +231,24 @@ var watch = (sources, cb) => {
   effect();
   return () => dispose(effect);
 };
-var cleanupNode = (node) => {
+var cleanupNode = (node, skipLeave = false) => {
+  if (!node)
+    return;
   if (node._cleanups) {
     node._cleanups.forEach((fn) => fn());
     node._cleanups.clear();
   }
   if (node._ownerEffect)
     dispose(node._ownerEffect);
+  if (!skipLeave && node._sig_leave) {
+    return node._sig_leave(() => {
       if (node.childNodes)
-    node.childNodes.forEach(cleanupNode);
+        node.childNodes.forEach((n) => cleanupNode(n, true));
+      node.remove();
+    });
+  }
+  if (node.childNodes)
+    node.childNodes.forEach((n) => cleanupNode(n, false));
 };
 var DANGEROUS_PROTOCOL = /^\s*(javascript|data|vbscript):/i;
 var isDangerousAttr = (key) => key === "src" || key === "href" || key.startsWith("on");
@@ -410,44 +419,61 @@ var render = (renderFn) => {
     destroy: () => {
       cleanups.forEach((fn) => fn());
       cleanupNode(container);
+      if (!container._sig_leave)
         container.remove();
     }
   };
 };
-var when = (cond, render2, { enter, leave } = {}) => {
+var when = (cond, SIP, NOP = null) => {
-  const wrap = h("div", { style: "display:contents" });
+  const anchor = doc.createTextNode("");
-  let view = null;
+  const root = h("div", { style: "display:contents" }, [anchor]);
-  const wait = (el, cb) => {
+  let currentView = null;
-    if (!el)
+  watch(() => !!(isFunc(cond) ? cond() : cond), (show) => {
-      return cb();
+    if (currentView) {
-    let done = false;
+      currentView.destroy();
-    const finish = () => !done && (done = true, cb());
+      currentView = null;
-    el.addEventListener("transitionend", finish, { once: true });
-    el.addEventListener("animationend", finish, { once: true });
-    setTimeout(finish, 500);
-  };
-  watch(cond, (on) => {
-    if (on && !view) {
-      const el = (view = render2(render2)).container.firstChild;
-      wrap.appendChild(view.container);
-      if (enter && el) {
-        el.classList.add(enter);
-        el.clientTop;
-        el.classList.add(enter + "-active");
-        wait(el, () => el.classList.remove(enter, enter + "-active"));
-      }
-    } else if (!on && view) {
-      const el = view.container.firstChild;
-      const destroyView = () => (view.destroy(), view = null);
-      if (leave && el) {
-        el.classList.add(leave);
-        wait(el, destroyView);
-      } else {
-        destroyView();
     }
+    const content = show ? SIP : NOP;
+    if (content) {
+      currentView = render(() => isFunc(content) ? content() : content);
+      root.insertBefore(currentView.container, anchor);
     }
   });
-  return onUnmount(() => view?.destroy()), wrap;
+  onUnmount(() => currentView?.destroy());
+  return root;
+};
+var fx = ({ name, duration = 200, scale, slide, rotate, blur }, child) => {
+  const el = typeof child === "function" ? child() : child;
+  if (!(el instanceof Node))
+    return el;
+  if (name) {
+    el.style.animation = `${name}-in ${duration}ms`;
+    el._sig_leave = (done) => {
+      el.style.animation = `${name}-out ${duration}ms`;
+      el.addEventListener("animationend", done, { once: true });
+    };
+    return el;
+  }
+  const hasTransform = scale || slide || rotate || blur;
+  el.style.transition = hasTransform ? `all ${duration}ms` : "";
+  el.style.opacity = "0";
+  if (scale)
+    el.style.transform = "scale(0.95)";
+  if (slide)
+    el.style.transform = "translateY(-10px)";
+  if (rotate)
+    el.style.transform = "rotate(-2deg)";
+  if (blur)
+    el.style.filter = "blur(4px)";
+  requestAnimationFrame(() => {
+    el.style.opacity = "1";
+    el.style.transform = scale || slide || rotate || blur ? "" : "none";
+  });
+  el._sig_leave = (done) => {
+    el.style.opacity = "0";
+    el.addEventListener("transitionend", done, { once: true });
+  };
+  return el;
 };
 var each = (src, itemFn, keyFn) => {
   const anchor = doc.createTextNode("");
@@ -514,6 +540,47 @@ router.params = $({});
 router.to = (p) => window.location.hash = p.replace(/^#?\/?/, "#/");
 router.back = () => window.history.back();
 router.path = () => window.location.hash.replace(/^#/, "") || "/";
+var req = ({ url, method = "GET", headers = {} }) => {
+  const loading = $(false);
+  const error = $(null);
+  const data = $(null);
+  let controller = null;
+  let timeoutId = null;
+  const run = async (body = null) => {
+    controller?.abort();
+    clearTimeout(timeoutId);
+    controller = new AbortController;
+    timeoutId = setTimeout(() => controller.abort(), 1e4);
+    loading(true);
+    error(null);
+    try {
+      const isFormData = body instanceof FormData;
+      const res = await fetch(url, {
+        method,
+        headers: isFormData ? headers : { "Content-Type": "application/json", ...headers },
+        body: isFormData ? body : body ? JSON.stringify(body) : undefined,
+        signal: controller.signal
+      });
+      const text = await res.text();
+      const json = text ? JSON.parse(text) : null;
+      if (!res.ok)
+        throw new Error(json?.message || res.statusText);
+      data(json);
+      return json;
+    } catch (e) {
+      if (e.name !== "AbortError")
+        error(e.message);
+      throw e;
+    } finally {
+      loading(false);
+      clearTimeout(timeoutId);
+      controller = null;
+      timeoutId = null;
+    }
+  };
+  const abort = () => controller?.abort();
+  return { run, abort, loading, error, data };
+};
 var mount = (comp, target) => {
   const t = typeof target === "string" ? doc.querySelector(target) : target;
   if (!t)
@@ -525,7 +592,7 @@ var mount = (comp, target) => {
   MOUNTED_NODES.set(t, inst);
   return inst;
 };
-var SigPro = Object.freeze({ $, $$, watch, h, when, each, router, mount, batch });
+var SigPro = Object.freeze({ $, $$, watch, h, when, each, fx, router, req, mount, batch });
 if (typeof window !== "undefined") {
   Object.assign(window, SigPro);
   "a abbr article aside audio b blockquote br button canvas caption cite code col colgroup datalist dd del details dfn dialog div dl dt em embed fieldset figcaption figure footer form h1 h2 h3 h4 h5 h6 header hr i iframe img input ins kbd label legend li main mark meter nav object ol optgroup option output p picture pre progress section select slot small source span strong sub summary sup svg table tbody td template textarea tfoot th thead time tr u ul video".split(" ").forEach((tag) => {
@@ -536,8 +603,10 @@ export {
   when,
   watch,
   router,
+  req,
   mount,
   h,
+  fx,
   each,
   batch,
   $$,

dist/sigpro.js

@@ -43,8 +43,10 @@
     when: () => when,
     watch: () => watch,
     router: () => router,
+    req: () => req,
     mount: () => mount,
     h: () => h,
+    fx: () => fx,
     each: () => each,
     batch: () => batch,
     $$: () => $$,
@@ -284,15 +286,24 @@
     effect();
     return () => dispose(effect);
   };
-  var cleanupNode = (node) => {
+  var cleanupNode = (node, skipLeave = false) => {
+    if (!node)
+      return;
     if (node._cleanups) {
       node._cleanups.forEach((fn) => fn());
       node._cleanups.clear();
     }
     if (node._ownerEffect)
       dispose(node._ownerEffect);
+    if (!skipLeave && node._sig_leave) {
+      return node._sig_leave(() => {
         if (node.childNodes)
-      node.childNodes.forEach(cleanupNode);
+          node.childNodes.forEach((n) => cleanupNode(n, true));
+        node.remove();
+      });
+    }
+    if (node.childNodes)
+      node.childNodes.forEach((n) => cleanupNode(n, false));
   };
   var DANGEROUS_PROTOCOL = /^\s*(javascript|data|vbscript):/i;
   var isDangerousAttr = (key) => key === "src" || key === "href" || key.startsWith("on");
@@ -463,44 +474,61 @@
       destroy: () => {
         cleanups.forEach((fn) => fn());
         cleanupNode(container);
+        if (!container._sig_leave)
           container.remove();
       }
     };
   };
-  var when = (cond, render2, { enter, leave } = {}) => {
+  var when = (cond, SIP, NOP = null) => {
-    const wrap = h("div", { style: "display:contents" });
+    const anchor = doc.createTextNode("");
-    let view = null;
+    const root = h("div", { style: "display:contents" }, [anchor]);
-    const wait = (el, cb) => {
+    let currentView = null;
-      if (!el)
+    watch(() => !!(isFunc(cond) ? cond() : cond), (show) => {
-        return cb();
+      if (currentView) {
-      let done = false;
+        currentView.destroy();
-      const finish = () => !done && (done = true, cb());
+        currentView = null;
-      el.addEventListener("transitionend", finish, { once: true });
-      el.addEventListener("animationend", finish, { once: true });
-      setTimeout(finish, 500);
-    };
-    watch(cond, (on) => {
-      if (on && !view) {
-        const el = (view = render2(render2)).container.firstChild;
-        wrap.appendChild(view.container);
-        if (enter && el) {
-          el.classList.add(enter);
-          el.clientTop;
-          el.classList.add(enter + "-active");
-          wait(el, () => el.classList.remove(enter, enter + "-active"));
-        }
-      } else if (!on && view) {
-        const el = view.container.firstChild;
-        const destroyView = () => (view.destroy(), view = null);
-        if (leave && el) {
-          el.classList.add(leave);
-          wait(el, destroyView);
-        } else {
-          destroyView();
       }
+      const content = show ? SIP : NOP;
+      if (content) {
+        currentView = render(() => isFunc(content) ? content() : content);
+        root.insertBefore(currentView.container, anchor);
       }
     });
-    return onUnmount(() => view?.destroy()), wrap;
+    onUnmount(() => currentView?.destroy());
+    return root;
+  };
+  var fx = ({ name, duration = 200, scale, slide, rotate, blur }, child) => {
+    const el = typeof child === "function" ? child() : child;
+    if (!(el instanceof Node))
+      return el;
+    if (name) {
+      el.style.animation = `${name}-in ${duration}ms`;
+      el._sig_leave = (done) => {
+        el.style.animation = `${name}-out ${duration}ms`;
+        el.addEventListener("animationend", done, { once: true });
+      };
+      return el;
+    }
+    const hasTransform = scale || slide || rotate || blur;
+    el.style.transition = hasTransform ? `all ${duration}ms` : "";
+    el.style.opacity = "0";
+    if (scale)
+      el.style.transform = "scale(0.95)";
+    if (slide)
+      el.style.transform = "translateY(-10px)";
+    if (rotate)
+      el.style.transform = "rotate(-2deg)";
+    if (blur)
+      el.style.filter = "blur(4px)";
+    requestAnimationFrame(() => {
+      el.style.opacity = "1";
+      el.style.transform = scale || slide || rotate || blur ? "" : "none";
+    });
+    el._sig_leave = (done) => {
+      el.style.opacity = "0";
+      el.addEventListener("transitionend", done, { once: true });
+    };
+    return el;
   };
   var each = (src, itemFn, keyFn) => {
     const anchor = doc.createTextNode("");
@@ -567,6 +595,47 @@
   router.to = (p) => window.location.hash = p.replace(/^#?\/?/, "#/");
   router.back = () => window.history.back();
   router.path = () => window.location.hash.replace(/^#/, "") || "/";
+  var req = ({ url, method = "GET", headers = {} }) => {
+    const loading = $(false);
+    const error = $(null);
+    const data = $(null);
+    let controller = null;
+    let timeoutId = null;
+    const run = async (body = null) => {
+      controller?.abort();
+      clearTimeout(timeoutId);
+      controller = new AbortController;
+      timeoutId = setTimeout(() => controller.abort(), 1e4);
+      loading(true);
+      error(null);
+      try {
+        const isFormData = body instanceof FormData;
+        const res = await fetch(url, {
+          method,
+          headers: isFormData ? headers : { "Content-Type": "application/json", ...headers },
+          body: isFormData ? body : body ? JSON.stringify(body) : undefined,
+          signal: controller.signal
+        });
+        const text = await res.text();
+        const json = text ? JSON.parse(text) : null;
+        if (!res.ok)
+          throw new Error(json?.message || res.statusText);
+        data(json);
+        return json;
+      } catch (e) {
+        if (e.name !== "AbortError")
+          error(e.message);
+        throw e;
+      } finally {
+        loading(false);
+        clearTimeout(timeoutId);
+        controller = null;
+        timeoutId = null;
+      }
+    };
+    const abort = () => controller?.abort();
+    return { run, abort, loading, error, data };
+  };
   var mount = (comp, target) => {
     const t = typeof target === "string" ? doc.querySelector(target) : target;
     if (!t)
@@ -578,7 +647,7 @@
     MOUNTED_NODES.set(t, inst);
     return inst;
   };
-  var SigPro = Object.freeze({ $, $$, watch, h, when, each, router, mount, batch });
+  var SigPro = Object.freeze({ $, $$, watch, h, when, each, fx, router, req, mount, batch });
   if (typeof window !== "undefined") {
     Object.assign(window, SigPro);
     "a abbr article aside audio b blockquote br button canvas caption cite code col colgroup datalist dd del details dfn dialog div dl dt em embed fieldset figcaption figure footer form h1 h2 h3 h4 h5 h6 header hr i iframe img input ins kbd label legend li main mark meter nav object ol optgroup option output p picture pre progress section select slot small source span strong sub summary sup svg table tbody td template textarea tfoot th thead time tr u ul video".split(" ").forEach((tag) => {

docs/sigpro.js

@@ -43,8 +43,10 @@
     when: () => when,
     watch: () => watch,
     router: () => router,
+    req: () => req,
     mount: () => mount,
     h: () => h,
+    fx: () => fx,
     each: () => each,
     batch: () => batch,
     $$: () => $$,
@@ -284,15 +286,24 @@
     effect();
     return () => dispose(effect);
   };
-  var cleanupNode = (node) => {
+  var cleanupNode = (node, skipLeave = false) => {
+    if (!node)
+      return;
     if (node._cleanups) {
       node._cleanups.forEach((fn) => fn());
       node._cleanups.clear();
     }
     if (node._ownerEffect)
       dispose(node._ownerEffect);
+    if (!skipLeave && node._sig_leave) {
+      return node._sig_leave(() => {
         if (node.childNodes)
-      node.childNodes.forEach(cleanupNode);
+          node.childNodes.forEach((n) => cleanupNode(n, true));
+        node.remove();
+      });
+    }
+    if (node.childNodes)
+      node.childNodes.forEach((n) => cleanupNode(n, false));
   };
   var DANGEROUS_PROTOCOL = /^\s*(javascript|data|vbscript):/i;
   var isDangerousAttr = (key) => key === "src" || key === "href" || key.startsWith("on");
@@ -463,44 +474,61 @@
       destroy: () => {
         cleanups.forEach((fn) => fn());
         cleanupNode(container);
+        if (!container._sig_leave)
           container.remove();
       }
     };
   };
-  var when = (cond, render2, { enter, leave } = {}) => {
+  var when = (cond, SIP, NOP = null) => {
-    const wrap = h("div", { style: "display:contents" });
+    const anchor = doc.createTextNode("");
-    let view = null;
+    const root = h("div", { style: "display:contents" }, [anchor]);
-    const wait = (el, cb) => {
+    let currentView = null;
-      if (!el)
+    watch(() => !!(isFunc(cond) ? cond() : cond), (show) => {
-        return cb();
+      if (currentView) {
-      let done = false;
+        currentView.destroy();
-      const finish = () => !done && (done = true, cb());
+        currentView = null;
-      el.addEventListener("transitionend", finish, { once: true });
-      el.addEventListener("animationend", finish, { once: true });
-      setTimeout(finish, 500);
-    };
-    watch(cond, (on) => {
-      if (on && !view) {
-        const el = (view = render2(render2)).container.firstChild;
-        wrap.appendChild(view.container);
-        if (enter && el) {
-          el.classList.add(enter);
-          el.clientTop;
-          el.classList.add(enter + "-active");
-          wait(el, () => el.classList.remove(enter, enter + "-active"));
-        }
-      } else if (!on && view) {
-        const el = view.container.firstChild;
-        const destroyView = () => (view.destroy(), view = null);
-        if (leave && el) {
-          el.classList.add(leave);
-          wait(el, destroyView);
-        } else {
-          destroyView();
       }
+      const content = show ? SIP : NOP;
+      if (content) {
+        currentView = render(() => isFunc(content) ? content() : content);
+        root.insertBefore(currentView.container, anchor);
       }
     });
-    return onUnmount(() => view?.destroy()), wrap;
+    onUnmount(() => currentView?.destroy());
+    return root;
+  };
+  var fx = ({ name, duration = 200, scale, slide, rotate, blur }, child) => {
+    const el = typeof child === "function" ? child() : child;
+    if (!(el instanceof Node))
+      return el;
+    if (name) {
+      el.style.animation = `${name}-in ${duration}ms`;
+      el._sig_leave = (done) => {
+        el.style.animation = `${name}-out ${duration}ms`;
+        el.addEventListener("animationend", done, { once: true });
+      };
+      return el;
+    }
+    const hasTransform = scale || slide || rotate || blur;
+    el.style.transition = hasTransform ? `all ${duration}ms` : "";
+    el.style.opacity = "0";
+    if (scale)
+      el.style.transform = "scale(0.95)";
+    if (slide)
+      el.style.transform = "translateY(-10px)";
+    if (rotate)
+      el.style.transform = "rotate(-2deg)";
+    if (blur)
+      el.style.filter = "blur(4px)";
+    requestAnimationFrame(() => {
+      el.style.opacity = "1";
+      el.style.transform = scale || slide || rotate || blur ? "" : "none";
+    });
+    el._sig_leave = (done) => {
+      el.style.opacity = "0";
+      el.addEventListener("transitionend", done, { once: true });
+    };
+    return el;
   };
   var each = (src, itemFn, keyFn) => {
     const anchor = doc.createTextNode("");
@@ -567,6 +595,47 @@
   router.to = (p) => window.location.hash = p.replace(/^#?\/?/, "#/");
   router.back = () => window.history.back();
   router.path = () => window.location.hash.replace(/^#/, "") || "/";
+  var req = ({ url, method = "GET", headers = {} }) => {
+    const loading = $(false);
+    const error = $(null);
+    const data = $(null);
+    let controller = null;
+    let timeoutId = null;
+    const run = async (body = null) => {
+      controller?.abort();
+      clearTimeout(timeoutId);
+      controller = new AbortController;
+      timeoutId = setTimeout(() => controller.abort(), 1e4);
+      loading(true);
+      error(null);
+      try {
+        const isFormData = body instanceof FormData;
+        const res = await fetch(url, {
+          method,
+          headers: isFormData ? headers : { "Content-Type": "application/json", ...headers },
+          body: isFormData ? body : body ? JSON.stringify(body) : undefined,
+          signal: controller.signal
+        });
+        const text = await res.text();
+        const json = text ? JSON.parse(text) : null;
+        if (!res.ok)
+          throw new Error(json?.message || res.statusText);
+        data(json);
+        return json;
+      } catch (e) {
+        if (e.name !== "AbortError")
+          error(e.message);
+        throw e;
+      } finally {
+        loading(false);
+        clearTimeout(timeoutId);
+        controller = null;
+        timeoutId = null;
+      }
+    };
+    const abort = () => controller?.abort();
+    return { run, abort, loading, error, data };
+  };
   var mount = (comp, target) => {
     const t = typeof target === "string" ? doc.querySelector(target) : target;
     if (!t)
@@ -578,7 +647,7 @@
     MOUNTED_NODES.set(t, inst);
     return inst;
   };
-  var SigPro = Object.freeze({ $, $$, watch, h, when, each, router, mount, batch });
+  var SigPro = Object.freeze({ $, $$, watch, h, when, each, fx, router, req, mount, batch });
   if (typeof window !== "undefined") {
     Object.assign(window, SigPro);
     "a abbr article aside audio b blockquote br button canvas caption cite code col colgroup datalist dd del details dfn dialog div dl dt em embed fieldset figcaption figure footer form h1 h2 h3 h4 h5 h6 header hr i iframe img input ins kbd label legend li main mark meter nav object ol optgroup option output p picture pre progress section select slot small source span strong sub summary sup svg table tbody td template textarea tfoot th thead time tr u ul video".split(" ").forEach((tag) => {

sigpro.js

@@ -1,4 +1,4 @@
-// sigpro 1.2.15
+// sigpro 1.2.16
 const isFunc = f => typeof f === "function"
 const isObj = o => o && typeof o === "object"
 const isArr = Array.isArray
@@ -222,14 +222,21 @@ const watch = (sources, cb) => {
   return () => dispose(effect)
 }
 
-const cleanupNode = node => {
+const cleanupNode = (node, skipLeave = false) => {
+  if (!node) return;
   if (node._cleanups) {
-    node._cleanups.forEach(fn => fn())
+    node._cleanups.forEach(fn => fn());
-    node._cleanups.clear()
+    node._cleanups.clear();
   }
-  if (node._ownerEffect) dispose(node._ownerEffect)
+  if (node._ownerEffect) dispose(node._ownerEffect);
-  if (node.childNodes) node.childNodes.forEach(cleanupNode)
+  if (!skipLeave && node._sig_leave) {
+    return node._sig_leave(() => {
+      if (node.childNodes) node.childNodes.forEach(n => cleanupNode(n, true));
+      node.remove();
+    });
   }
+  if (node.childNodes) node.childNodes.forEach(n => cleanupNode(n, false));
+};
 
 const DANGEROUS_PROTOCOL = /^\s*(javascript|data|vbscript):/i
 const isDangerousAttr = key => key === 'src' || key === 'href' || key.startsWith('on')
@@ -398,48 +405,70 @@ const render = renderFn => {
     destroy: () => {
       cleanups.forEach(fn => fn())
       cleanupNode(container)
-      container.remove()
+      if (!container._sig_leave) container.remove()
     }
   }
 }
 
-const when = (cond, render, { enter, leave } = {}) => {
+const when = (cond, SIP, NOP = null) => {
-  const wrap = h('div', { style: 'display:contents' })
+  const anchor = doc.createTextNode("")
-  let view = null
+  const root = h("div", { style: "display:contents" }, [anchor])
+  let currentView = null
 
-  const wait = (el, cb) => {
+  watch(
-    if (!el) return cb()
+    () => !!(isFunc(cond) ? cond() : cond),
-    let done = false
+    show => {
-    const finish = () => !done && (done = true, cb())
+      if (currentView) {
-    el.addEventListener('transitionend', finish, { once: true })
+        currentView.destroy()
-    el.addEventListener('animationend', finish, { once: true })
+        currentView = null
-    setTimeout(finish, 500)
       }
 
-  watch(cond, on => {
+      const content = show ? SIP : NOP
-    if (on && !view) {
+      if (content) {
-      const el = (view = render(render)).container.firstChild
+        currentView = render(() => isFunc(content) ? content() : content)
-      wrap.appendChild(view.container)
+        root.insertBefore(currentView.container, anchor)
-      if (enter && el) {
-        el.classList.add(enter); el.clientTop
-        el.classList.add(enter + '-active')
-        wait(el, () => el.classList.remove(enter, enter + '-active'))
-      }
-    } else if (!on && view) {
-      const el = view.container.firstChild
-      const destroyView = () => (view.destroy(), view = null)
-      if (leave && el) {
-        el.classList.add(leave)
-        wait(el, destroyView)
-      } else {
-        destroyView()
       }
     }
-  })
+  )
 
-  return onUnmount(() => view?.destroy()), wrap
+  onUnmount(() => currentView?.destroy())
+  return root
 }
 
+const fx = ({ name, duration = 200, scale, slide, rotate, blur }, child) => {
+  const el = typeof child === 'function' ? child() : child;
+  if (!(el instanceof Node)) return el;
+
+  if (name) {
+    el.style.animation = `${name}-in ${duration}ms`;
+    el._sig_leave = (done) => {
+      el.style.animation = `${name}-out ${duration}ms`;
+      el.addEventListener('animationend', done, { once: true });
+    };
+    return el;
+  }
+
+  const hasTransform = scale || slide || rotate || blur;
+  el.style.transition = hasTransform ? `all ${duration}ms` : '';
+  el.style.opacity = '0';
+  if (scale) el.style.transform = 'scale(0.95)';
+  if (slide) el.style.transform = 'translateY(-10px)';
+  if (rotate) el.style.transform = 'rotate(-2deg)';
+  if (blur) el.style.filter = 'blur(4px)';
+
+  requestAnimationFrame(() => {
+    el.style.opacity = '1';
+    el.style.transform = scale || slide || rotate || blur ? '' : 'none';
+  });
+
+  el._sig_leave = (done) => {
+    el.style.opacity = '0';
+    el.addEventListener('transitionend', done, { once: true });
+  };
+
+  return el;
+};
+
 const each = (src, itemFn, keyFn) => {
   const anchor = doc.createTextNode("")
   const root = h("div", { style: "display:contents" }, [anchor])
@@ -503,6 +532,52 @@ router.to = p => window.location.hash = p.replace(/^#?\/?/, "#/")
 router.back = () => window.history.back()
 router.path = () => window.location.hash.replace(/^#/, "") || "/"
 
+const req = ({ url, method = 'GET', headers = {} }) => {
+  const loading = $(false);
+  const error = $(null);
+  const data = $(null);
+  let controller = null;
+  let timeoutId = null;
+
+  const run = async (body = null) => {
+    controller?.abort();
+    clearTimeout(timeoutId);
+    controller = new AbortController();
+    timeoutId = setTimeout(() => controller.abort(), 10000);
+    loading(true);
+    error(null);
+
+    try {
+      const isFormData = body instanceof FormData;
+      const res = await fetch(url, {
+        method,
+        headers: isFormData ? headers : { 'Content-Type': 'application/json', ...headers },
+        body: isFormData ? body : (body ? JSON.stringify(body) : undefined),
+        signal: controller.signal
+      });
+
+      const text = await res.text();
+      const json = text ? JSON.parse(text) : null;
+
+      if (!res.ok) throw new Error(json?.message || res.statusText);
+      data(json);
+      return json;
+    } catch (e) {
+      if (e.name !== 'AbortError') error(e.message);
+      throw e;
+    } finally {
+      loading(false);
+      clearTimeout(timeoutId);
+      controller = null;
+      timeoutId = null;
+    }
+  };
+
+  const abort = () => controller?.abort();
+
+  return { run, abort, loading, error, data };
+};
+
 const mount = (comp, target) => {
   const t = typeof target === "string" ? doc.querySelector(target) : target
   if (!t) return
@@ -513,7 +588,7 @@ const mount = (comp, target) => {
   return inst
 }
 
-const SigPro = Object.freeze({ $, $$, watch, h, when, each, router, mount, batch })
+const SigPro = Object.freeze({ $, $$, watch, h, when, each, fx, router, req, mount, batch })
 
 if (typeof window !== "undefined") {
   Object.assign(window, SigPro)
@@ -523,4 +598,4 @@ if (typeof window !== "undefined") {
     })
 }
 
-export { $, $$, watch, h, when, each, router, mount, batch }
+export { $, $$, watch, h, when, each, fx, router, req, mount, batch }