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JavaScript - remove substring from string between indexes

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In this post we can find simple way of how to create own function to remove substring from string in JavaScript.

// ONLINE-RUNNER:browser;

function removeSubstring(text, startIndex, endIndex) {
  	if (endIndex < startIndex) {
  		startIndex = endIndex;
    var a = text.substring(0, startIndex);
    var b = text.substring(endIndex);

    return a + b;

// Usage example:

//   index: 0    5 7   11 14
//          |    | |   |  |
var text = "This is my text";

console.log( removeSubstring(text, 0, 5) );               // is my text
console.log( removeSubstring(text, 5, 7) );               // This  my text
console.log( removeSubstring(text, 1, text.length - 1) ); // Tt


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