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26 lines
940 B
26 lines
940 B
/**
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* @description: 为了兼容非H5 props 传Function 调用后this指向子组件问题，用此方法获取后再触发
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* @param {String} handlerName props 方法名称
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* @return {Function} 返回一个绑定传入方vm为this指向的方法
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* @example: this.$getPropsFn('beforeOpen')()
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*/
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export default function getPropsFn(handlerName) {
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const handler = this[handlerName];
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if (typeof handler === 'function') {
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// #ifndef H5
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let parent = this.$parent;
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while (parent) {
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// 因为在非H5中props中的方法没有绑定this，尝试从$options.methods上找到传递的方法
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const methodsHandlers = Object.values(parent.$options.methods || {});
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if (methodsHandlers.includes(handler)) {
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// 使this指向使用该组件的实例vm
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return handler.bind(parent);
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} else {
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parent = parent.$parent;
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}
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}
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// #endif
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return handler;
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}
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return undefined;
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}
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