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25 lip 2024 · The switch statement evaluates an expression, matching the expression's value against a series of case clauses, and executes statements after the first case clause with a matching value, until a break statement is encountered.
24 maj 2010 · const str = 'XYZ test'; switch (str.toLowerCase()) { case String(str.match(/^xyz.*/i)): console.log("Matched a string without case sensitivity"); break; case String(str.match(/.*tes.*/)): console.log("Matched a string using a substring 'tes'"); break; }
12 paź 2022 · In a switch statement, the comparison with the cases is via ===, and a string instance is not === to a string primitive. Three ways to fix it: If you change your switch to: switch (String(this)) {. ...that will turn it back into a primitive, whereupon your switch works.
The JavaScript Switch Statement. Use the switch statement to select one of many code blocks to be executed. Syntax. switch (expression) { case x: // code block. break; case y: // code block. break; default: // code block. } This is how it works: The switch expression is evaluated once.
Use switch to select one of many blocks of code to be executed. This is the perfect solution for long, nested if/else statements. The switch statement evaluates an expression. The value of the expression is then compared with the values of each case in the structure.
25 lip 2024 · A switch statement allows a program to evaluate an expression and attempt to match the expression's value to a case label. If a match is found, the program executes the associated statement. A switch statement looks like this:
14 kwi 2015 · The switch statement evaluates an expression, matching the expression's value to a case clause, and executes statements associated with that case. Syntax switch (expression) { case value1: //Statements executed when the result of expression matches value1 [break;] case value2: //Statements executed the result of expression matches value2 [break
