javascript setTimeout() usage summary, js setTimeout() method

Introduction js's setTimeout method is more useful, usually used in page refresh, delayed execution, and so on. But many javascript novices still don't know the usage of setTimeout very well. Although I have studied and applied javascript for more than two years, sometimes I have to consult the materials for setTimeout method. Today, I will mak ...

Posted by salomo on Thu, 05 Mar 2020 05:57:10 -0800

VUE realizes Studio management background: state mode realizes window docking, flexible and free

Yesterday's tabs window was very satisfactory. Today, we have made it possible to change the display style according to its size. When its width is too small, the tab page can float and dock on one side. Specific effect:Left Right Always like simple and clear things, so want to achieve a little more simple, but reality does not allow ah, the ...

Posted by calexa on Thu, 05 Mar 2020 05:28:06 -0800

The method of detecting data type and encapsulating a general method in JS

Test data type 1: typeof   The returned results are all strings, including the corresponding data type "number"/"string"/"boolean"/"undefined"/"symbol"/"object"/"function"; Limitation: when null is detected, the returned result is "object". When other special object ...

Posted by LostOne on Tue, 03 Mar 2020 01:04:13 -0800

Can key events be simulated by programming?

Can key events be simulated programmatically in JavaScript? #1 building Non jquery versions that can be used in both webkit and gecko: var keyboardEvent = document.createEvent("KeyboardEvent"); var initMethod = typeof keyboardEvent.initKeyboardEvent !== 'undefined' ? "initKeyboardEvent" : "initKeyEvent"; keyboardEvent[initMethod]( "k ...

Posted by swamp on Mon, 02 Mar 2020 23:15:41 -0800

The scope of action of elastic search aggregation

test data index structure PUT /employees/ { "mappings" : { "properties" : { "age" : { "type" : "integer" }, "gender" : { "type" : "keyword" }, "job" : { "type" : "text", "fields" : { "keyword" : { "type" : "keyword", " ...

Posted by Urbley on Mon, 02 Mar 2020 20:26:35 -0800

js event delegate target

** Take a look, take a look!** Talk about event delegation and target.Let's first look at what events are.What is an event?The general explanation is something that is more important and has a certain impact on a certain population.This is not the case in JavaScript, where events are actions that happen and are effectively handled.For a better ...

Posted by kevin777 on Sun, 01 Mar 2020 18:29:26 -0800

Learning Javascript to simulate the implementation of call,apply

Preface This article is 1630 words, it takes about 8 minutes to read. All in all: in this paper, we simulate and implement a relatively perfect call and apply method from scratch by raising problems and then solving them Reference documents: Function.prototype.call(),Function.prototype.apply() The official account: front-end learning, repl ...

Posted by tron00 on Sun, 01 Mar 2020 04:14:47 -0800

Learn 03 JS (get element, event basis, operation element, node get element, focus)

Get elements document.getElementById('parameter '); Get id element console.dir(time); Print element objects document.getElementsByTagName('tagname '); Get elements with tags var nav = document.getElementById('id name '); var nav1 = nav.getElementsByTagName('tagname '); You can get some labels i ...

Posted by richclever on Thu, 27 Feb 2020 18:53:51 -0800

JavaScript uses the alert() function in jQuery $("ා). Blur() to cause infinite cycles to lose focus and execute the pop-up warning solution

Problem analysis of this record: 1. Time difference problem: When I click alert, I clear and focus the input box, but the moment I click alert, the focus is not on the input box, and the defocus event is triggered, resulting in the alert pop-up. 2. Sequence question: With the mentality of first letting it pop up in the execution of clearing and ...

Posted by BDabrowski on Wed, 26 Feb 2020 20:46:34 -0800

The use of echarts report technology

1, Introduction to echarts It is an open-source visualization library implemented by JavaScript, which can run smoothly on PC and mobile devices, and is compatible with most current browsers (IE8/9/10/11, Chrome, Firefox, Safari, etc.), the bottom layer relies on vector graphics library ZRender, providi ...

Posted by installer69 on Wed, 26 Feb 2020 19:22:28 -0800