JavaScript

1.alert ()[1.1] Blocking action, no click OK, subsequent code can not continue to execute[1.2]alert () can only output a string if the alert output is an object that automatically calls the ToString () methode.g. alert ([+/-]);[1.3]alert does not

Because JS Foundation has been very poor, so I feel a lot of basic knowledge is not reliable, now take a moment to understand, although the completion of this post I may still not know, but the record at least I will again and again, and deepen the

After writing two design patterns, the feeling was not perfect, decided to retreat to practice and write down notes.Reiterate: Design patterns are useful!Here's a list of design patterns to prevent something from leaking (unfinished no link)

First of all: the scope of JS is different from the scope of other languages, pay special attention.The concept of scope in JS:Represents the area in which a variable or function works, referring to the context in which they are executed, i.e. the

1, very good pop-up windowhttps://limonte.github.io/sweetalert2/Https://github.com/limonte/sweetalert2Import './untils/swal.css ';Import Swal from ' Sweetalert2 'Swal.queue (steps). Then (function (Result) { swal.resetdefaults () Swal ({ title:

The reason is that three browsers have different processing order for three properties.Chrome Order: onclick, href-and targetIE and Firefox order: href---target---And my need is to click on the a tag to execute a method before opening a new window.

JS array to filter out false, NULL, 0, "", Undefined, and Nan values methodFor False,null,0,undefiend,nan Direct fetch ! is all true , so here only need to judge the empty string "" ;Look directly at the code:function bouncer(arr) { // Don‘t show a

12345Title6 the -Wuyi the - javascript--the properties of the function object caller and callee

I. Characteristics of closures and the relationship between closures and garbage collection mechanisms1Two. Examples of non-closures1Three. Examples of differences between closures and non-closures1javascript--Closure Package

Summarize:1.for, while, Do-while loop performance is comparable, and no one loop type is significantly faster than or full of other types.2. Avoid using the for-in loop unless you want to traverse an object with an unknown number of attributes.3.

12345Title6 + A the + -Problems of javascript--pre-parsing in IE

Implementation results:The implementation effect is as shownImplementation principle:What is a somersault cloud effect: The effect is simple, that is, when you move the mouse over the other navigation directory, there will be a background

ECMAScript Object (hereinafter referred to as the object):ECMA-262 defines an object as a collection of unordered properties whose properties can contain basic values, objects, or functions.Each property or method of an object has a name, and each

For example, we want the use of moment.js inside our REASONML code.What we can does is create a module file:// moment.re = = TT = "moment" and "= String =" "[@ @bs. send];Using It inside Component:/*This is the basic component.*/Let component=

1.Heap: Heap Reference valueStack: Stack advanced after the value is the copy of the relationshipImmutable Original value: number String Boolean undefined null stackReference value: Array Object function ... date RegExp (regular) heapvar arr

Three ways to use : Put in the Put in the Placed in an external JS fileDOCTYPE HTML>HTMLLang= "en">Head> MetaCharSet= "UTF-8"> title>Text1title> Script> functiondisplaydate () {document.getElementById ("Text1").

Three ways to use : Put in the Put in the Placed in an external JS file Three ways to output data: Use the document.write () method to write content to an HTML document. Use the Window.alert () pop-

Center in percentage layout, center in percentage Layout Methods for vertical and horizontal center of percentage Layout 1. Set the width and height with em/rem Parent-level setting width: 5rem; height: 5rem; text-align: center;Subset line-height:

30 best Bootstrap 3.0 free themes and templates, 30 bootstrap The Twitter Bootstrap framework is widely known for accelerating the development of Web pages, applications, or themes. It is recognized as one of the most useful tools for Web

Bootstrap-table sum total quantity statistics, bootstrap-tablesum I wrote a page to display the total number of all amounts in the data, but I didn't know how to assign values when I used footerformatter. First: To do so to modify the source