GeezerVison is showing developer.mozilla.org — TextDecoder - Web APIs | MDN
TextDecoder
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since January 2020.
The TextDecoder interface represents a decoder for a specific text encoding, such as UTF-8, ISO-8859-2, or GBK. A decoder takes an array of bytes as input and returns a JavaScript string.
The TextDecoder interface doesn't inherit any methods.
TextDecoder.decode()-
Decodes the given bytes into a JavaScript string and returns it.
This example shows how to decode the UTF-8 encoding of the character "𠮷".
html <button id="decode">Decode</button>
<button id="reset">Reset</button>
<div id="output"></div>
js const utf8decoder = new TextDecoder(); // default 'utf-8'
const encodedText = new Uint8Array([240, 160, 174, 183]);
const output = document.querySelector("#output");
const decodeButton = document.querySelector("#decode");
decodeButton.addEventListener("click", () => {
output.textContent = utf8decoder.decode(encodedText);
});
const resetButton = document.querySelector("#reset");
resetButton.addEventListener("click", () => {
window.location.reload();
});
In this example, we decode the Russian text "Привет, мир!", which means "Hello, world." In our TextDecoder() constructor, we specify the Windows-1251 character encoding.
html <button id="decode">Decode</button>
<button id="reset">Reset</button>
<div id="decoded"></div>
js const win1251decoder = new TextDecoder("windows-1251");
const encodedText = new Uint8Array([
207, 240, 232, 226, 229, 242, 44, 32, 236, 232, 240, 33,
]);
const decoded = document.querySelector("#decoded");
const decodeButton = document.querySelector("#decode");
decodeButton.addEventListener("click", () => {
decoded.textContent = win1251decoder.decode(encodedText);
});
const resetButton = document.querySelector("#reset");
resetButton.addEventListener("click", () => {
window.location.reload();
});
- The
TextEncoder interface describing the inverse operation.
|