JavaScript

Ternary operatorsJudging the conditions? (The condition is true when executed): (the condition is false)Contrast memoryvar color= ' Red ';Determine if the color is redif (color=== ' red ') {Console.log (' takeout ');}else {Console.log (' nothing ');}

Today in the project to use JavaScript to implement the data structure of the queue and stack, here to summarize.I. A brief introduction to queues and Stacks 1.1. Basic concepts of queues　　Queue: is a set that supports FIFO (first-in-first-out),

vartest ="Class01";functionClass01 (Privatevalue, publicvalue) { var_this = This; if( This. Constructor.name!==' Class01 ') { throw NewError (' class can only be instantiated '); } / * Self-executing function to count the number of

1.JavaScript variablesJavaScript variables are loosely typed (weakly typed), meaning that a variable can be used to hold any type of data, and each variable is simply a placeholder for the value to hold. The declaration of a variable is defined with

foreach is a method of manipulating an array in ES5, and the main function is to iterate through the array, for example:1 var arr = [1,2,3,4]; 2 Arr.foreach (alert);Equivalent to:1 var arr = [1, 2, 3, 4]; 2 for (var k = 0, length = arr.length; k ) {

JavaScript, as the most common literal-translation scripting language, has been widely used in WEB application development. In order to improve the performance of Web applications, it is a good choice to start with the JavaScript performance

(i) Event-handling model---event bubbling, capturing(1) Event bubbling - - - - - in - to + - theAs follows: Click on the Blue area, three div will be corresponding Click event(2) Event capture1Warpper.addeventlistener (' click

JavaScript is a Class C language, and it's pretty easy for me to learn.1 outputConsole.log (* *); Equivalent to printConsole.assert (*); popup 2 variable JS is a dynamic variable similar to Python but to precede with var such as var a = 3 or 3.0 or '

Object What is an object 　　　　All things in JavaScript are objects: strings, numbers, arrays, functions ... In addition, JavaScript allows custom objects to be customized.In a word, everything is an object in JavaScript. How to

Differences between undefined and not defined in javascript This article mainly introduces the differences between undefined and not defined in javascript. For more information, see The study found that there is a big difference between the two. I

Online quadratic equation calculator instance Share the online mona1 quadratic equation calculator instance. For more information, see. The Code is as follows: online mona1 quadratic equation calculator solving quadratic equation

Share JavaScript to get the webpage closing and canceling closing events This article mainly introduces how to use JavaScript to get the website closing and canceling the closing events. If you need it, refer to it. During Web development, we often

JavaScript checks whether the email address and mobile phone format entered by the user are correct JavaScript checks whether the email format entered by the user is correct and whether the mobile phone number format entered by the user is correct.

Javascript obtains the maximum value of an xml node. This article describes how to use javascript to obtain the maximum value of an xml node. For more information, see. Suppose the current time is 7000 Ms. When the time is 3000-6000, the value of

10 best free JS frameworks and JS library recommendations, js frameworksToday we focus on some JavaScript frameworks that are useful to web developers and designers. JavaScript is a client scripting language, which is the most popular in Web

Vue-Access-Control front-end user permission Control solution, Vue-Access-Control is a front-end user permission Control solution based on Vue, Vue-Router, and axios. It controls the routing, view, and request layers, this allows developers to

Line feed, text hidden ellipsis, text hidden ellipsis1. A line exceeds text hiding Overflow: hidden;/* hide text automatically */text-overflow: ellipsis;/* Add ellipsis after text hiding */white-space: nowrap;/* force line breaks */  2. div displays

Sublime installation and plug-in installation, and sublime installation plug-in Download sublime https://www.sublimetext.com/3 from the official website   After installation Press ctrl + 'or View-> Show Console, and enter the following code (sublime

Placeholder font style and compatibility, placeholder Font Style Style modification css:-Webkit-input-placeholder {/* WebKit browsers */color: # fff! Important ;}:-Moz-placeholder {/* Mozilla Firefox 4 to 18 */color: # fff! Important

Beginner in front-end development and beginner in development Just entered the park, in order to record the problems and understanding in the process of learning html. There is no foundation. Now I am watching the teaching video. I just finished