JavaScript Syntax

JavaScript Syntax

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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The syntax of JavaScript is the set of rules that define a correctly structured JavaScript program. The examples below make use of the alert function for standard text output. The JavaScript standard library lacks an official standard text output function. However, given that JavaScript is mainly used for client-side scripting within modern web browsers, and that almost all web browsers provide the alert function, alert is used in the examples. JavaScript is case sensitive. It is common to start the name of a constructor with a capitalised letter, and the name of a function or variable with a lower-case letter. Spaces, tabs and newlines used outside of string constants are called whitespace. Unlike C, whitespace in JavaScript source can directly impact semantics. Because of a technique called "semicolon insertion," some statements that are well formed when a newline is parsed will be considered complete. Programmers are advised to supply statement-terminating semicolons explicitly, although it degrades readability, because it may lessen unintended effects of the automatic semicolon insertion.
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Product details

  • Paperback | 112 pages
  • 152 x 229 x 7mm | 177g
  • United States
  • English
  • 6136603802
  • 9786136603803