Web Reference: Jul 8, 2025 · This chapter documents all the JavaScript language operators, expressions and keywords. The !! operator reassures the lint tool that what you wrote is what you meant: do this operation, then take the truth value of the result. A third use is to produce logical XOR and logical XNOR. Assignment operators assign values to JavaScript variables. The Addition Assignment Operator (+=) adds a value to a variable. Assignment operators are fully described in the JS Assignment chapter. Comparison operators are used to compare two values. Comparison operators always return true or false.
YouTube Excerpt: Deep dive into a new syntax of ECMAScript 2021 - Logical Assignment
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