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Home Web Front-end JS Tutorial How to Remove Accents from Strings in JavaScript, Including IE6 Compatibility?

How to Remove Accents from Strings in JavaScript, Including IE6 Compatibility?

Dec 21, 2024 pm 12:16 PM

How to Remove Accents from Strings in JavaScript, Including IE6 Compatibility?

Removing Accents/Diacritics from Strings in JavaScript

This article delves into the techniques for removing accents or diacritics from strings in JavaScript, addressing the challenge faced in IE6 with regular expressions.

Using ES2015/ES6 String.prototype.normalize()

ES2015/ES6 introduces the String.prototype.normalize() method, which enables the removal of diacritics. For example:

const str = "Crème Br?lée";
const normalized = str.normalize("NFD").replace(/[\u0300-\u036f]/g, "");
console.log(normalized); // Output: "Creme Brulee"

Note that "NFD" is used to decompose combined graphemes into simple ones, facilitating the removal of diacritics.

Using Unicode Property Escapes

Another approach involves using Unicode property escapes:

const str = "Crème Br?lée";
const removed = str.normalize("NFD").replace(/\p{Diacritic}/gu, "");
console.log(removed); // Output: "Creme Brulee"

For Sorting Purposes

If the goal is merely sorting, Intl.Collator can be utilized:

const c = new Intl.Collator();
const arr = ["creme brulee", "crème br?lée", ...];
arr.sort(c.compare);

IE6 Considerations

With IE6, regular expressions can be problematic. To address this, a straightforward approach would be to manually replace specific accented characters with their equivalent basic characters. For instance:

const accentsTidy = (str) => {
  return str
    .toLowerCase()
    .replace(/\s/g, "")
    .replace(/[àáa???]/g, "a")
    .replace(/?/g, "ae")
    // ... and so on
    .replace(/\W/g, "");
};

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