String manipulation is a common task in JavaScript, and replacing all occurrences of a string is one such operation. In this comprehensive guide, we'll explore various techniques and methods to replace all instances of a substring within a string. By the end, you'll be well-versed in handling string replacements in JavaScript.

Introduction to String Replacement
Understand the significance of replacing all occurrences of a string within JavaScript and recognize the difficulties this task can pose.

Using String.prototype.replace()
Learn how to use the built-in replace() method to replace all instances of a substring.

const originalString = "apple apple apple";
const replacedString = originalString.replace(/apple/g, "orange");

Using String.prototype.split() and Array.prototype.join()
Discover an alternative approach by splitting the string and joining it back with the desired replacement.

const originalString = "apple apple apple";
const replacedString = originalString.split("apple").join("orange");

Using Regular Expressions
Explore the power of regular expressions for global string replacements, including handling special characters.

const originalString = "apple apple apple";
const replacedString = originalString.replace(/apple/g, "orange");

Using Third-Party Libraries
Find out how third-party libraries like Lodashand Ramdacan simplify the process of replacing all occurrences of a string.

const _ = require('lodash');
const originalString = "apple apple apple";
const replacedString = _.replace(originalString, /apple/g, "orange");

Performance Considerations
Evaluate the performance implications of different replacement methods and learn tips for optimizing large-scale replacements.

Case Studies and Practical Examples
Explore real-world scenarios where replacing all occurrences of a string is crucial, along with practical code examples.

Common Pitfalls and Mistakes
Identify common pitfalls and errors developers often encounter when performing string replacements and learn how to avoid them.

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