weui-wxss
Version:
39 lines (36 loc) • 1.23 kB
JavaScript
/**
* mixins 为 Page 增加 mixin 功能
* 来源：https://segmentfault.com/a/1190000019527762
*/
const originPage = Page;
const originProperties = ['data', 'properties', 'options'];
const originMethods = ['onLoad', 'onReady', 'onShow', 'onHide', 'onUnload', 'onPullDownRefresh', 'onReachBottom', 'onShareAppMessage', 'onPageScroll', 'onTabItemTap'];
function merge(mixins, options) {
mixins.forEach((mixin) => {
if (Object.prototype.toString.call(mixin) !== '[object Object]') {
throw new Error('mixin 类型必须为对象！');
}
for (const [key, value] of Object.entries(mixin)) {
if (originProperties.includes(key)) {
options[key] = { ...value, ...options[key] };
} else if (originMethods.includes(key)) {
const originFunc = options[key];
options[key] = function (...args) {
value.call(this, ...args);
return originFunc && originFunc.call(this, ...args);
};
} else {
options = { ...mixin, ...options };
}
}
});
return options;
}
Page = (options) => {
const { mixins } = options;
if (Array.isArray(mixins)) {
delete options.mixins;
options = merge(mixins, options);
}
originPage(options);
};