cleartimeout

Why is clearTimeout not clearing the timeout in this react component?

由 我只是一个虾纸丫 提交于 2021-01-27 05:40:14
问题 I am attempting to clear a former timeout before initiating a new timeout, because I want messages to display for 4 seconds and disappear UNLESS a new message pops up before the 4 seconds is up. The Problem: Old timeouts are clearing the current message, so clearTimeout() is not working in this component, in this scenario: let t; // "t" for "timer" const [message, updateMessage] = useState('This message is to appear for 4 seconds. Unless a new message replaces it.'); function clearLogger() {

clearTimeout not working: parameter undefined(even though it's defined in the global scope)

由 微笑、不失礼 提交于 2020-01-16 09:06:50
问题 My setTimeout() function works, but my clearTimeout() is not working. Even though I have an 'if' statement that's supposed to run the clearTimeout function once my variable 'secs' is less than 0, the timer keeps counting down into negative numbers. When I type my variable name, 'secs' into the console, I get undefined, even though it's defined as a parameter in the function called by my setTimeout. I don't know what I'm doing wrong. Can anyone help, please? My full code is at https://codepen

clearInterval,setInterval,clearTimeout,setTimeout

由 久未见 提交于 2020-01-05 01:41:40
setInterval("f()",1000) 每隔1秒就执行一次f() clearInterval 关闭clearInterval setTimeout("f()",1000) 1秒后执行f(),只执行一次 clearTimeout 关闭setTimeout 1.简单版应用html代码 <html> <head> <script type="text/javascript"> var c=0 var t function timedCount() { document.getElementById('txt').value=c c=c+1 t=setTimeout("timedCount()",1000) } function stopCount() { clearTimeout(t) } </script> </head> <body> <form> <input type="button" value="Start count!" onClick="timedCount()"> <input type="text" id="txt"> <input type="button" value="Stop count!" onClick="stopCount()"> </form> </body> </html> 2.文字上下翻滚html代码（无缺陷） <script type=

How to pause a function in JavaScript? [duplicate]

由 感情迁移 提交于 2019-12-10 16:52:16
问题 This question already has answers here : What is the JavaScript version of sleep()? (75 answers) Closed 5 years ago . I have a long function in JavaScript and I am going to pause it at some points. I know that I can do that using setTimeout(myFunction, 100) and clearTimeout() . But, as I know, after using setTimeout(myFunction, 100) my function would be executed from its first line after 100 milliseconds and thereafter every 100 milliseconds. I am wondering if I can pause my function on its

Node.js实战6：定时器，使用timer延迟执行。

由 那年仲夏 提交于 2019-12-09 08:23:29
setTimeout 在nodejs中，通过setTimeout函数可以达到延迟执行的效果，这个函数也常被称为定时器。 一个简单的例子： console.log( (new Date()).getSeconds() );setTimeout(function(){ console.log( (new Date()).getSeconds() ); console.log("hello world"); //延迟一秒执行},1000); 执行效果： 可以看到，执行时，先输出了当时时间的秒数，过1秒后，输入出秒和hello world，间隔正是1秒。上面的参数中1000，单位是毫秒，即1秒。 在nodejs中，常用setTimeout来实现异步操作。 bind 还有一种高级的用法，看例程： function bomb(){ this.message = "bomb";}bomb.prototype.explode =function(){ console.log(this.message);}var bomb = new bomb();setTimeout(bomb.explode.bind(bomb),1000); 即：使用bind可以确保这个方法绑定到正确的对象上，这样可以访问到这个对象的内部属性。 执行效果： clearTimeout 通过clearTimeout函数

ClearTimeout set in another tab

由 喜欢而已 提交于 2019-11-29 17:35:26
How can I clear timeout that has been set in another tab in browser? I tried by storing timeout reference in localStorage , but could not clear timeout function setIdleTimeout() { var idleTimeout = setTimeout(function() { //autologout }, 20000); localStorage.setItem('idleTimeout', idleTimeout); } function clearIdleTimeout() { var idleTimeout = localStorage.getItem('idleTimeout'); clearTimeout(idleTimeout); localStorage.setItem('idleTimeout', idleTimeout); } If I call clearIdleTimeout() in second tab, it does not clear the timeout set in previous tab tab "a" var timeout, interval; timeout =

ClearTimeout set in another tab

由 為{幸葍}努か 提交于 2019-11-28 12:10:37
问题 How can I clear timeout that has been set in another tab in browser? I tried by storing timeout reference in localStorage , but could not clear timeout function setIdleTimeout() { var idleTimeout = setTimeout(function() { //autologout }, 20000); localStorage.setItem('idleTimeout', idleTimeout); } function clearIdleTimeout() { var idleTimeout = localStorage.getItem('idleTimeout'); clearTimeout(idleTimeout); localStorage.setItem('idleTimeout', idleTimeout); } If I call clearIdleTimeout() in
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