Promise
示例一
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| let myFirstPromise = new Promise((resolve, reject) => {
setTimeout( function() {
resolve("Success!")
}, 250)
})
myFirstPromise.then((successMessage) => {
console.log("Yay! " + successMessage)
return 'yes'
}).then((successMessage) => {
console.log("next! " + successMessage)
});
|
示例二
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| // callback 形式调用
wx.chooseImage({
success(res) {
console.log('res:', res)
}
})
// promise 形式调用
wx.chooseImage().then(res => console.log('res: ', res))
|
Promise - JavaScript | MDN
References
The Modern JavaScript Tutorial