How do I replace all occurrences of a string in JavaScript?

In JavaScript, you can replace all occurrences of a string using the replace() method in combination with a regular expression. Here's an example:

javascript
let str = "The quick brown fox jumps over the lazy dog."; 
let newStr = str.replace(/the/gi, "a"); 
console.log(newStr); // Output: "A quick brown fox jumps over a lazy dog."

In the above example, the /the/gi regular expression is used to match all occurrences of the string "the" (ignoring case), and replace them with the letter "a".

The g flag is used to perform a global search (i.e. replace all occurrences), and the i flag is used to ignore case sensitivity.

You can replace the regular expression and replacement string to match your specific needs.

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