strict mode

Instance:We often see code like this: The title of the document the contents of the document ... Note: You can see a single line on the "DOCTYPE" (document type) declaration, which tells the browser which specification to use to interpret the

The role of DOCTYPE? The difference between strict mode and promiscuous mode and trigger conditions? DOCTYPE is used to specify which criteria the browser will use to parse (HTML or XHTML pages). In strict mode, the page is rendered in

1.?? operator (NULL merge operator) $a = $_get[' A ']?? 1; It is equivalent to: $a = empty ($_get[' a '])? 1: $_get[' a ']; We know that ternary operators can be used in this way: $a?: 1 But this is based on the premise that the $a has been defined.

JQuery 3.0 recently released its final, new version. Since October 2014, the jquery team has started to maintain this major release, and the web developer community has been looking forward to this moment, and finally in June 2016 they ushered in a

First, the grammar------------------------------ Everything in JavaScript (variables, function names, and operators) is case-sensitive. Identifier: Refers to the name of the variable, function, property, the identifier is required as

Read "You don't know JavaScript" a book to make a note;Compiler principle:JS is a compiled language, similar to the traditional compilation language, the traditional compilation process is divided into three stages;1. Word segmentation/lexical

The interface is the most critical part of the Android app that directly affects the user experience. If the code is not well implemented, the interface is prone to Dayton and causes the application to consume a lot of memory. Division I do this

This series of content for my usual project practice and reference Mdn,msdn, "JavaScript language Essence", "effective JavaScript" and other materials, and organize their daily accumulation of Evernote write, time is too long some code sample source

1. XHTML-compatible methods:2. Document mode:IE5.5 introduced, initially contains 2 kinds: promiscuous and standard mode, after IE proposed quasi-standard mode; the document does not begin to declare the document type, and the browser turns on

Ajax, cross-domain, JSONPReference: JavaScript Advanced Programming Chapter 21st: AJAX operations in Ajax and Comet jquery Usage and differences for apply and call: Usage:Can inherit the methods and properties of another object, except

Ajax, cross-domain, JSONP Reference: JavaScript Advanced Programming Chapter 21st: AJAX operations in Ajax and Comet jquery Usage and differences for apply and call: Usage:Can inherit the methods and properties of another object,

What is this?This is bound at run time, not at the time of writing, and its context depends on the various conditions when the function is called. The binding of this and the position of the function declaration have no relation, only depends on how

1, the principle of compiling In a traditional compiled language process, a piece of code in a program goes through three steps before it executes. Collectively referred to as "compilation." Lexical analysis Break code strings into meaningful

Front. Eval and with are often abandoned as if their existence were errors. In CSS, the table is abandoned, in the Web page only use tables to display data, rather than do layout, can be dismissed as irregular, overkill. What about Eval and with?

Example: We often see code like this: document title contents of the document ... Note: you can see a line on the top of the statement about "DOCTYPE" (document type), which tells the browser which specification to use to interpret the

During the Olympic Games, IE 8 Beta 2 will be released, and with the English version of the release, the Chinese version will also be published in the first wave. IE 8 will be the most important release of Internet Explorer history, with the

1. Background introduction: In the system monkey test and case test, we found in Dropbox a large number of Strictmode rigorous mode of error, in order to enhance the stability of the system, we intend to the project early on these types of errors

5414028670432123After upgrading MySQL, actually use the error. Update time prompt timestamp type error, prompt no default value errorThe original is MySQL upgraded security, the original 0000-00-00 is not allowed, the default value must also be

Recently used cicada known CMS station than more, feel pretty handy, but in the installation of customers will appear installation error, the reason is very simpleLooking at their Install.sql file, the default value for some time fields is 0000-00-00

First, Strict mode1. ECMAScript5 introduced the concept of strict pattern (strict mode). The intent is to define a different parsing and execution pattern for JavaScript.2, the difference in strict mode:(1), some uncertain behavior will be processed.