tinypng-lib v1.1.24
TinyPNG图片压缩工具使用
介绍
- 基于
tinypng
的图片压缩工具,支持图片压缩功能。 - 使用客户端压缩图片,无需上传到服务器,直接在客户端进行压缩。
- 支持WebWork
- npm:tinypng-lib
- 在线体验地址:https://tinypng.wcrane.cn/
使用方法
- 安装
npm install tinypng-lib
- 基本使用
<template>
<div id="app">
<input type="file" @input="uploadImg" />
<img :src="imgUrl" alt="">
</div>
</template>
<script>
import TinyPNG from 'tinypng-lib'
export default {
name: 'App',
components: {
},
data() {
return {
imgUrl: ''
}
},
methods: {
async uploadImg(e) {
const file = e.target.files[0];
try {
const res = await TinyPNG.compress(file, {})
console.log('res', res)
const url = URL.createObjectURL(res.blob)
const img = new Image()
this.imgUrl = url
} catch (error) {
console.log("error", error)
}
}
}
}
</script>
参数说明
参数 | 说明 | 默认值 |
---|---|---|
minimumQuality | 最小质量 | 35 |
quality | 期望压缩质量(0-100) | 88 |
fileName | 压缩后的文件名 | 文件名称 |
/**
* 压缩图片参数
*/
interface CompressOptions {
minimumQuality?: number; // 最小质量
quality?: number; // 压缩质量 0 - 100
fileName?: string; // 压缩后的文件名, 默认为file.name
}
返回值说明
/**
* 压缩图片结果
*/
interface CompressResult {
success: boolean, // 是否成功
file: File, // 压缩后的文件
originalSize: number, // 原始文件大小
compressedSize: number, // 压缩后文件大小
rate: number, // 压缩率(压缩为原来的%)
output: ArrayBuffer, // 压缩后的 ArrayBuffer
blob: Blob, // 压缩后的 Blob
rateString: string, // 压缩率字符串
}
WebWorker中使用
基本使用
1. webpack项目中安装
worker-loader
npm install worker-loader
- 在
webpack.config.js
中配置
module.exports = {
// ...
module: {
rules: [
{
test: /\.worker\.js$/,
use: { loader: 'worker-loader' },
},
],
},
};
- 定义
imageWorker.worker.js
// imageWorker.worker.js
import TinyPNG from 'tinypng-lib';
self.onmessage = async function (e) {
const {
image,
options
} = e.data;
try {
// 使用支持webWorker的方法
const result = await TinyPNG.compressWorkerImage(image, options);
self.postMessage(result);
} catch (error) {
self.postMessage({ error: error.message });
}
};
- 在组件中使用
- 监听webworker的消息
- 使用
TinyPNG.getImage
处理文件信息 - 发送图片信息给webworker进行压缩
- 接收webworker返回的压缩结果
<script>
// Import the worker
import ImageWorker from './imageWorker.worker.js'; // This is the bundled worker
import { getSizeTrans } from '../utils';
import TinyPNG from 'tinypng-lib';
export default {
name: 'Base',
mounted() {
// Start the worker when the component is mounted
this.worker = new ImageWorker();
// Receive the message (compressed result) from the worker
this.worker.onmessage = (e) => {
this.compressing = false;
const result = e.data;
if (result.error) {
console.error("Compression failed:", result.error);
} else {
// 拿到压缩结果
console.log(e);
}
};
},
methods: {
getSizeTrans,
async uploadImg(e) {
const file = e.file;
// 获取图片信息
const image = await TinyPNG.getImage(file);
// Send the file to the worker for compression
this.worker.postMessage({
image,
options: {
minimumQuality: 30,
quality: 85
}
});
}
},
beforeDestroy() {
// Terminate the worker when the component is destroyed
if (this.worker) {
this.worker.terminate();
}
}
}
</script>
- 说明:对于jpeg、jpg的图片不支持使用WebWorker压缩需要使用
TinyPNG.compressJpegImage
进行压缩
import TinyPNG from 'tinypng-lib';
TinyPNG.compressJpegImage(file, options)
CompressWorker 使用
- 封装代码
import ImageWorker from './imageWorker.worker.js'; // 与前面imageWorker.worker.js一致
export class CompressWorker {
worker = null;
constructor() {
this.worker = new ImageWorker();
}
async compress(file, options) {
// 获取图片信息
const image = await TinyPNG.getImage(file);
return new Promise((resolve, reject) => {
// 监听worker的消息
this.worker.onmessage = (e) => {
const result = e.data;
if (result.error && !result.success) {
console.error("Compression failed:", result.error);
reject(result.error);
} else {
resolve(result);
}
};
// Send the file to the worker for compression
this.worker.postMessage({
image,
options
});
});
}
terminate() {
if (this.worker) {
this.worker.terminate();
this.worker = null;
}
}
}
- 使用
- 实例化:
CompressWorker
只注册一次就行,比如vue的mounted生命周期 - 图片压缩
- 页面或者组件卸载的时候执行, 销毁
CompressWorker
实例
- 实例化:
// 1. 只注册一次就行,比如vue的mounted生命周期
compressWorker = new CompressWorker();
// 2. 监听选择的图片,图片压缩
compressWorker.compress(file, {
minimumQuality: 30,
quality: 85
}).then((result) => {
// 压缩结果
console.log(result);
})
// 3. 页面或者组件卸载的时候执行, 销毁webworker
if (compressWorker) {
compressWorker.terminate();
}
注意事项
- 请确保已经安装了
tinypng-lib
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