全局自定义指令: // main.js Vue.directive('focus-right', { inserted: function (el) { el.addEventListener('focus', function () { const length = el.value.length; setTimeout(() => { el.selectionStart = length; el.selectionEnd = length; }); }); } }); 在组件里: 或者插件: // focusPlugin.js const FocusRightPlugin = { install(Vue) { Vue.prototype.$inputFocusRight = function (e) { const input = e.target; const length = input.value.length; setTimeout(() => { input.selectionStart = length; input.selectionEnd = length; }); }; } }; // 在 main.js 里 import FocusRightPlugin from './focusPlugin'; Vue.use(FocusRightPlugin); // 然后在组件里用