10 examples of 'js read file' in JavaScript

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function read (file) {
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    return fs.readFileSync(file, {encoding: 'utf-8'})
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}

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function read(file) {
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  var finished;
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  var error;
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  var value;
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  var cb;
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  fs.readFile(file, 'utf8', function(err, str){
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    if (cb) {
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      cb(err, str);
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    } else {
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      finished = true;
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      error = err;
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      value = str;
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    }
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  });
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  return function(fn){
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    if (finished) {
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      fn(error, value);
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    } else {
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      cb = fn;
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    }
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  }
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}

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function _readJs(labelAndPath, cb)
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{
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  fs.readFile(config.filePath(labelAndPath), 'utf8', function(err, src) {
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    if ( err )
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      return void cb(err);
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    cb(null,{label: config.fileLabel(labelAndPath), src: src});
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  });
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}

8
function read(file) {
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  return fs.readFileSync(path.join(__dirname, file + '.js'), 'utf8');
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}

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private static async _read(file: string): Promise {
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    return await new Promise((resolve, reject) => {
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        fs.readFile(file, "utf8", (err, data) => {
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            if (err) reject(err);
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            resolve(data);
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        });
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    });
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}

89
function read(filename){
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  return fs.readFileSync(filename, { encoding: 'utf8' });
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}

37
function js(file) {
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  var opts = {
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    fromString: true,
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    sourceMapUrl: false
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  };
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  if (file.map) {
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    opts.inSourceMap = _.isObject(file.map) ? file.map : JSON.parse(file.map);
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    opts.outSourceMap = file.destFilename + '.map';
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  }
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  var result = uglifyjs.minify(file.content, opts);
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  return Promise.resolve({ content: result.code, map: result.map });
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}

5
function loadJS(libs) {
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    libs = libs.split('|');
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    for (var i=libs.length; i--;) {
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        document.write("");
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    } 
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}

5
function loadJs({
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    url,
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    options = {}
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}) {
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    return new Promise((resolve, reject) => {
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        if (!url) {
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            reject(new Error('NO URL'))
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        }
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        const timeout = options.timeout || 60000
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        const target = document.getElementsByTagName('head')[0] || document.head
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        let timer; let 
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            script
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        // 超时自动取消
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        if (timeout) {
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            timer = setTimeout(() => {
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                // eslint-disable-next-line no-use-before-define
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                cleanup()
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                reject(new Error('Timeout'))
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            }, timeout)
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        }
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        // 清理函数
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        function cleanup() {
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            if (script.parentNode) {
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                script.parentNode.removeChild(script)
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            }
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            if (timer) {
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                clearTimeout(timer)
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            }
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        }
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        // 创建js文件
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        script = document.createElement('script')
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        script.type = 'text/javascript'
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        script.charset = 'utf-8'
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        script.async = true
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        script.src = url
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        target.appendChild(script)
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        // IE的script 元素支持onreadystatechange事件，不支持onload事件 FF的script
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        // 元素不支持onreadystatechange事件，只支持onload事件
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        // eslint-disable-next-line no-multi-assign
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        script.onload = script.onreadystatechange = function () {
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            if (!script.readyState || script.readyState === 'loaded' || script.readyState === 'complete') {
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                resolve()
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                if (timer) {
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                    clearTimeout(timer)
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                }
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            }
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        }
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    })
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}

35
function readFileData(src) {
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  try { let _content = fs.readFileSync(src, { encoding: 'utf8' }); return _content; }
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  catch(error) {
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     throw new Error('Could not read file: ' + JSON.stringify(error));
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  }
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}