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16 gru 2013 · If you want to use switch to group the extension, you could use this: switch (file.extension) { case "txt": case "doc": return "document.jpg"; case "jpg": case "gif": case "png": return "image.jpg"; case "mpg": return "video.jpg"; // And so on for 50+ file extensions...
10 maj 2011 · Does anyone know an easy way to change a file extension in Javascript? For example, I have a variable with "first.docx" but I need to change it to "first.html". let pos = file.lastIndexOf("."); Note that there's an edge case if you use this on a filename that doesn't already have an extension.
If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying. You can also link to another Pen here, and we'll pull the JavaScript from that Pen and include it.
Use the switch statement to select one of many code blocks to be executed. This is how it works: The switch expression is evaluated once. The value of the expression is compared with the values of each case. If there is a match, the associated block of code is executed. If there is no match, the default code block is executed.
14 lut 2024 · In JavaScript, a switch statement is a control flow statement that evaluates an expression and executes code based on matching cases. It provides a more concise and readable way to handle multiple possible conditions compared to nested if...else statements. case value1: // code block to be executed if expression matches value1. break; case value2:
Switch statements express conditionals across many branches. Here’s a basic switch. You can use commas to separate multiple expressions in the same case statement. We use the optional default case in this example as well. switch without an expression is an alternate way to express if/else logic.
In this tutorial, we will learn how to use the switch statement and how to use it in javascript to control the flow of the program with example. The switch statement is a conditional statement (just like if..else) that allows the programmer to execute different blocks of code depending on the value of a variable.
