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js

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  1. FileType.JS Field - GroupDocs.Viewer for .NET -...

    JavaScript File (.Js)...JPG Field JPM Field JPX Field JS Field JSON Field LESS Field LOG...Field FileType JS Field JavaScript File (.js) Namespace: GroupDocs...

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  2. Handling text — strings in JavaScript - Learn w...

    Next, we'll turn our attention to strings — this is what pieces of text are called in programming. In this article, we'll look at all the common things that you really ought to know about strings when learning JavaScript, such as creating strings, escaping quotes in strings, and joining strings together....with, enter the following lines: js const string = "The revolution...entering the following lines: js const badString1 = This is a...

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  3. Grammar and types - JavaScript | MDN

    This chapter discusses JavaScript's basic grammar, variable declarations, data types and literals.... js const Früh = "foobar"; But, the...and in many other languages: js // a one line comment /* this...

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  4. SyntaxError: invalid capture group name in regu...

    The JavaScript exception "invalid capture group name in regular expression" occurs when a named capturing group or named backreference contains an invalid identifier.... Examples Invalid cases js /(?<1>\d+) (?<2>\d+)/; Or you...building the regex dynamically: js const tokenTypes = { "number...

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  5. Template literals (Template strings) - JavaScri...

    Template literals are literals delimited with backtick (`) characters, allowing for multi-line strings, string interpolation with embedded expressions, and special constructs called tagged templates.... Syntax js `string text` `string text line...backslash ( \ ) before the backtick. js `\`` === "`"; // true Dollar...

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  6. SyntaxError: missing : after property id - Java...

    The JavaScript exception "missing : after property id" occurs when objects are created using the object initializer syntax. A colon (:) separates keys and values for the object's properties. Somehow, this colon is missing or misplaced.... js const obj = { propertyKey: "value"...this object initializer syntax. js const obj = { propertyKey = "value"...

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  7. TypeError: invalid assignment to const "x" - Ja...

    The JavaScript exception "invalid assignment to const" occurs when it was attempted to alter a constant value. JavaScript const declarations can't be re-assigned or redeclared.... js const COLUMNS = 80; // … COLUMNS...already taken in this scope. js const COLUMNS = 80; const WIDE_COLUMNS...

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  8. TypeError: "x" is not a constructor - JavaScrip...

    The JavaScript exception "is not a constructor" occurs when there was an attempt to use an object or a variable as a constructor, but that object or variable is not a constructor.... Examples Invalid cases js const Car = 1; new Car(); //...write the following function: js function Car(make, model, year)...

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  9. SyntaxError: super() is only valid in derived c...

    The JavaScript exception "super() is only valid in derived class constructors" occurs when the super() call is used somewhere that's not the body of a constructor in a class with extends keyword....there's no base class to call: js class Base { constructor() {...called from the constructor: js class Base {} class Derived extends...

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  10. SyntaxError: "use strict" not allowed in functi...

    The JavaScript exception ""use strict" not allowed in function" occurs when a "use strict" directive is used at the top of a function with default parameters, rest parameters, or destructuring parameters....default parameters a=1 and b=2 : js function sum(a = 1, b = 2) {...directive outside of the function: js "use strict"; function sum(a...

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