【ES5 ES6】使用學習

【ES5 ES6】使用學習

轉載：

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一、Promise

二、下劃線轉駝峯，駝峯轉下劃線

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一、Promise

基本使用

    const promise = new Promise(function (resolve, reject) {
        console.log('pending ...');
        let random = parseInt(Math.random() * 10);
        let response = random % 2 == 0 ? true : false;
        if (response) {
            resolve(response);
        } else {
            reject(response);
        }
    });
    promise.then(response => {
        console.log('success: ' + response);
    }, error => {
        console.log('failure: ' + error);
    });

 二、下劃線轉駝峯，駝峯轉下劃線

// 下劃線轉駝峯
"name_face".replace(/_(\w)/g,function ($0,$1){return $1.toUpperCase();});

// 駝峯轉下劃線"nameFace".replace(/([A-Z])/g,"_$1").toLowerCase();