JavaScript area is not case sensitive

javascript is case sensitive. JavaScript is a case-sensitive language, and the naming of variable methods is strictly case-sensitive. When using keywords, variables, function names, and all identifiers in JavaScript, you must use consistent character case.

The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.

javascript is case sensitive.

JavaScript is a case-sensitive language, and the naming of variable methods is strictly case-sensitive. Example: var abc and var Abc are two impossible variables.

When using keywords, variables, function names, and all identifiers in JavaScript, you must use consistent character case.

For example, the keyword "while" must be entered as "while" and cannot be entered as "While" or "WHILE". Similarly, "online", "Online", "OnLine" and "ONLINE" " are four different variable names.

But be aware that HTML is not case-sensitive, which can be easily confused since it is closely related to client-side JavaScript. Many JavaScript objects and properties have the same names as the HTML tags and properties they represent.

In HTML these tags and property names can be entered in any case, but in JavaScript they are usually lowercase. For example, in HTML, the event handler property onclick is usually declared as onClick, but in JavaScript code only onclick can be used.

Recommended learning: javascript advanced tutorial

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