54 lines
1.7 KiB
JavaScript
54 lines
1.7 KiB
JavaScript
// 保存原生的 Page 函数
|
|
const originPage = Page
|
|
|
|
Page = (options) => {
|
|
const mixins = options.mixins
|
|
// mixins 必须为数组
|
|
if (Array.isArray(mixins)) {
|
|
delete options.mixins
|
|
// mixins 注入并执行相应逻辑
|
|
options = merge(mixins, options)
|
|
}
|
|
// 释放原生 Page 函数
|
|
originPage(options)
|
|
}
|
|
|
|
// 定义小程序内置的属性/方法
|
|
const originProperties = ['data', 'properties', 'options']
|
|
const originMethods = ['onLoad', 'onReady', 'onShow', 'onHide', 'onUnload', 'onPullDownRefresh', 'onReachBottom', 'onShareAppMessage', 'onPageScroll', 'onTabItemTap']
|
|
|
|
function merge(mixins, options) {
|
|
if (!Object.entries) {
|
|
Object.entries = function (obj) {
|
|
var ownProps = Object.keys(obj),
|
|
i = ownProps.length,
|
|
resArray = new Array(i); // preallocate the Array
|
|
while (i--)
|
|
resArray[i] = [ownProps[i], obj[ownProps[i]]];
|
|
return resArray;
|
|
};
|
|
}
|
|
mixins.forEach((mixin) => {
|
|
if (Object.prototype.toString.call(mixin) !== '[object Object]') {
|
|
throw new Error('mixin 类型必须为对象！')
|
|
}
|
|
// 遍历 mixin 里面的所有属性
|
|
for (let [key, value] of Object.entries(mixin)) {
|
|
if (originProperties.includes(key)) {
|
|
// 内置对象属性混入
|
|
options[key] = { ...value, ...options[key] }
|
|
} else if (originMethods.includes(key)) {
|
|
// 内置方法属性混入，优先执行混入的部分
|
|
const originFunc = options[key]
|
|
options[key] = function (...args) {
|
|
value.call(this, ...args)
|
|
return originFunc && originFunc.call(this, ...args)
|
|
}
|
|
} else {
|
|
// 自定义方法混入
|
|
options = { ...mixin, ...options }
|
|
}
|
|
}
|
|
})
|
|
return options
|
|
} |