Introduction to lz-string
LZ-String is a popular JavaScript library designed to provide efficient string compression. By leveraging LZ-based compression algorithms, lz-string helps developers significantly reduce the size of their data while maintaining integrity and performance.
Key APIs and Usage
1. Compress
Compress a string to a shorter representation.
const original = 'Hello, this is lz-string!'; const compressed = LZString.compress(original); console.log(compressed);
2. Decompress
Decompress a previously compressed string.
const decompressed = LZString.decompress(compressed); console.log(decompressed); // Output: Hello, this is lz-string!
3. CompressToBase64
Compress a string and encode it in Base64 format.
const compressedBase64 = LZString.compressToBase64(original); console.log(compressedBase64);
4. DecompressFromBase64
Decompress a previously compressed and Base64 encoded string.
const decompressedBase64 = LZString.decompressFromBase64(compressedBase64); console.log(decompressedBase64); // Output: Hello, this is lz-string!
5. CompressToUTF16
Compress a string using UTF-16 encoding.
const compressedUTF16 = LZString.compressToUTF16(original); console.log(compressedUTF16);
6. DecompressFromUTF16
Decompress a previously UTF-16 encoded string.
const decompressedUTF16 = LZString.decompressFromUTF16(compressedUTF16); console.log(decompressedUTF16); // Output: Hello, this is lz-string!
7. CompressToEncodedURIComponent
Compress a string and encode it as a URI component.
const compressedURI = LZString.compressToEncodedURIComponent(original); console.log(compressedURI);
8. DecompressFromEncodedURIComponent
Decompress a previously URI component encoded string.
const decompressedURI = LZString.decompressFromEncodedURIComponent(compressedURI); console.log(decompressedURI); // Output: Hello, this is lz-string!
Example Application
Let’s create a simple web app that uses lz-string to compress and decompress user input:
<!DOCTYPE html> <html> <head> <title>LZ-String Example</title> <script src="https://cdnjs.cloudflare.com/ajax/libs/lz-string/1.4.4/lz-string.min.js"></script> </head> <body> <h2>LZ-String Compression Example</h2> <textarea id="input" placeholder="Enter text to compress"></textarea><br> <button onclick="compressText()">Compress</button> <button onclick="decompressText()">Decompress</button> <p>Compressed Text: <span id="compressed-output"></span></p> <p>Decompressed Text: <span id="decompressed-output"></span></p> <script> function compressText() { const input = document.getElementById('input').value; const compressed = LZString.compress(input); document.getElementById('compressed-output').innerText = compressed; } function decompressText() { const compressed = document.getElementById('compressed-output').innerText; const decompressed = LZString.decompress(compressed); document.getElementById('decompressed-output').innerText = decompressed; } </script> </body> </html>
In this example, the user’s text is compressed and decompressed using lz-string. The app displays the compressed and decompressed text for verification.
By leveraging the power of lz-string, developers can optimize web applications and improve data transmission efficiency.
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