``` btn.click = on click; ```
时间: 2024-12-06 11:14:42 浏览: 46
这段代码是JavaScript语法,看起来像是尝试给一个名为"btn"的按钮对象添加点击事件处理函数。原始的写法`btn.click = on click;`在JavaScript中是错误的,应该是使用括号和参数来定义回调函数,如下:
```javascript
// 原始错误的写法(假设on click是一个函数)
// btn.click = on click; // 错误
// 正确的写法
btn.addEventListener('click', onClickFunction);
function onClickFunction() {
// 在这里编写你的点击事件处理逻辑
}
```
优化说明:
1. 使用`addEventListener`方法替代直接赋值,这样可以更好地支持事件代理和防止重复绑定。
2. 定义一个独立的函数作为事件处理器,使代码更清晰且易于维护。
优化后的完整代码:
```markdown
```javascript
// 定义事件处理函数
function onClickFunction() {
// 在这里编写你的点击事件处理逻辑
}
// 绑定点击事件
var btn = document.getElementById('yourButtonId'); // 替换为实际的按钮元素ID
btn.addEventListener('click', onClickFunction);
```
```
这里假设`yourButtonId`是你需要操作的实际按钮的ID。确保已经替换为正确的元素ID,并且`onClickFunction`函数已经被正确实现。
阅读全文
相关推荐
















<template> 查询条件 <a-form-model :model="searchForm" layout="inline" ref="searchForm" class="searchForm"> <a-form-model-item label="题库名称" prop="title"> <a-input v-model="searchForm.title" placeholder="请输入题库名称" /> </a-form-model-item> <a-form-model-item class="searchButton"> <a-button type="primary" v-if="QX.read" @click="getSearch">查询</a-button> <a-button type="default" v-if="QX.read" @click="restSearch('searchForm')">重置</a-button> </a-form-model-item> </a-form-model> <a-button type="primary" @click="addBank" icon="plus" v-if="QX.add">新增</a-button> <a-table :columns="columns" :data-source="dataList" :pagination="false" :loading="loading" rowKey="questionBankId" :scroll="{ y: this.$getViewportSize().height - 300 }" > <a-icon class="iconBtn" type="edit" />编辑 <a-divider v-if="QX.edit && QX.delete" type="vertical" /> <a-popconfirm title="确认是否删除?" ok-text="是" cancel-text="否" @confirm="removeBank(record)" > <a-icon class="iconBtn" type="delete" />删除 </a-popconfirm> </a-table> <template slot="action" slot-scope="text, record, index"> 删除 </template> <a-pagination show-size-changer :total="totalPage" :current="pageIndex" :pageSize="pageSize" @showSizeChange="onShowSizeChange" @change="onChangePage" style="float: right; margin-top: 15px" /> <a-drawer :closable="true" :title="title" width="auto" :visible="visible" @close="visible = !visible" > <a-spin class="submitLoading" :spinning="submitLoading"> <a-form-model :model="form" :label-col="labelCol" :wrapper-col="wrapperCol" :rules="rules" ref="form" class="lay-drawer-form"> <a-row> <a-col :span="12"> <a-form-model-item label="题库名称" prop="title"> <a-input v-model="form.title" :maxLength="25" placeholder="请输入题库名称" style="width: 380px" /> </a-form-model-item> </a-col> <a-col :span="12"> <a-form-model-item label="关联岗位" prop="positionId"> <a-select v-model="form.positionId" style="width: 380px" placeholder="请选择岗位"> <a-select-option v-for="(label, value) in positionDict" :key="value" :value="value"> {{ label }} </a-select-option> </a-select> </a-form-model-item> </a-col> <a-col :span="12"> <a-form-model-item label="参与PK" prop="participateInPk"> <a-switch v-model="form.participateInPk" :checkedValue="1" :unCheckedValue="0" /> </a-form-model-item> </a-col> </a-row> </a-form-model> <a-button type="primary" @click="downloadTemplate">下载模板</a-button> <a-upload name="file" :showUploadList="false" :beforeUpload="beforeUpload" accept=".xlsx,.xls" :disabled="!importEnabled" > <a-button :disabled="!importEnabled"><a-icon type="upload" /> 导入题目</a-button> </a-upload> <a-button type="dashed" @click="addTopicVisible = true" :disabled="!addEnabled" > <a-icon type="plus" /> 添加题目 </a-button> {{ index + 1 }}. {{ topic.content }} <label v-for="option in getOptions(topic)" :key="option.key"> <input type="radio" :name="'topic' + topic.topicId" :value="option.key" :checked="topic.correctAnswer === option.key" /> {{ option.key }}. {{ option.value }} </label> <label> <input type="radio" :name="'topic' + topic.topicId" value="正确" :checked="topic.correctAnswer === '正确'" /> 正确 </label> <label> <input type="radio" :name="'topic' + topic.topicId" value="错误" :checked="topic.correctAnswer === '错误'" /> 错误 </label> <a-icon type="delete" /> 删除 <a-pagination v-model="topicPageNum" :pageSize="topicPageSize" :total="totalTopicCount" @change="handleTopicPageChange" style="text-align: right;" /> <a-button type="default" @click="visible = !visible" > 取消 </a-button> <a-button type="primary" @click="submitForm" > 确认 </a-button> </a-spin> </a-drawer> <a-drawer title="新增题目" :visible="addTopicVisible" @close="addTopicVisible = false" width="500" > <a-form-model :model="addTopicForm" layout="vertical" :rules="rulesForAddTopic" ref="addTopicFormRef"> <a-form-model-item label="题目类型" prop="topicType"> <a-select v-model="addTopicForm.topicType" style="width: 100%"> <a-select-option :value="1">选择题</a-select-option> <a-select-option :value="2">判断题</a-select-option> </a-select> </a-form-model-item> <a-form-model-item label="题目内容" prop="content"> <a-input v-model="addTopicForm.content" placeholder="请输入题目内容" /> </a-form-model-item> <a-form-model-item label="选项A" prop="optionA"> <a-input v-model="addTopicForm.optionA" placeholder="请输入选项A内容" /> </a-form-model-item> <a-form-model-item label="选项B" prop="optionB"> <a-input v-model="addTopicForm.optionB" placeholder="请输入选项B内容" /> </a-form-model-item> <a-form-model-item label="选项C" prop="optionC"> <a-input v-model="addTopicForm.optionC" placeholder="请输入选项C内容" /> </a-form-model-item> <a-form-model-item label="选项D" prop="optionD"> <a-input v-model="addTopicForm.optionD" placeholder="请输入选项D内容" /> </a-form-model-item> <a-form-model-item label="正确答案" prop="correctAnswer"> <a-select v-model="addTopicForm.correctAnswer" style="width: 100%"> <a-select-option value="A">A</a-select-option> <a-select-option value="B">B</a-select-option> <a-select-option value="C">C</a-select-option> <a-select-option value="D">D</a-select-option> </a-select> </a-form-model-item> <a-form-model-item label="正确答案" prop="correctAnswer"> <a-select v-model="addTopicForm.correctAnswer" style="width: 100%"> <a-select-option value="正确">正确</a-select-option> <a-select-option value="错误">错误</a-select-option> </a-select> </a-form-model-item> <a-button @click="addTopicVisible = false">取消</a-button> <a-button type="primary" @click="saveNewTopic">保存</a-button> </a-form-model> </a-drawer> </template> <script> import { req, fileDownload } from '../../../api/axiosFun'; import preventBack from 'vue-prevent-browser-back'; export default { name: 'Bank', mixins: [preventBack], data() { return { QX: {}, topicQX: {}, topicList: [], totalTopicCount: 0, // 题目总数 topicPageNum: 1, // 当前页码 topicPageSize: 10, // 每页数量 addTopicVisible: false, addTopicForm: { content: '', // 题目内容 topicType: 1, // 题目类型:1=选择题,2=判断题 optionA: '', optionB: '', optionC: '', optionD: '', correctAnswer: '', }, disabled: false, checkedKeys: [], selectAuth: [], treeData: [], positionDict: {}, title: '', labelCol: { span: 4 }, wrapperCol: { span: 20 }, tableHeight: 0, expanded: false, // 筛选条件是否展开 form: { questionBankId: 0, bankCode: '', title: '', positionId: '', participateInPk: true, }, isEdit: false, // 是否是编辑状态 isAdd: false, // 是否是新增状态 importEnabled: false, // 导入题目按钮是否可用 - 默认为不可用 addEnabled: false, // 添加题目按钮是否可用 - 默认为不可用 rules: { positionId: [ { required: true, message: '请选择岗位', trigger: 'blur' }, ], title: [ { required: true, message: '请输入题库名称', trigger: 'blur' }, ], }, rulesForAddTopic: { content: [ { required: true, message: '请输入题目内容', trigger: ['blur', 'change'] }, ], topicType: [ { required: true, message: '请选择题目类型', trigger: 'change' }, ], optionA: [ { required: (rule, value) => this.addTopicForm.topicType === 1, message: '选择题必须输入选项A', trigger: ['blur', 'change'], }, ], optionB: [ { required: (rule, value) => this.addTopicForm.topicType === 1, message: '选择题必须输入选项B', trigger: ['blur', 'change'], }, ], optionC: [ { required: (rule, value) => this.addTopicForm.topicType === 1, message: '选择题必须输入选项C', trigger: ['blur', 'change'], }, ], optionD: [ { required: (rule, value) => this.addTopicForm.topicType === 1, message: '选择题必须输入选项D', trigger: ['blur', 'change'], }, ], correctAnswer: [ { required: true, message: '请选择正确答案', trigger: 'change' }, ], }, searchForm: { title: '', }, visible: false, dataList: [], columns, loading: false, submitLoading: false, pageIndex: 1, pageSize: 10, totalPage: 0, ops: { vuescroll: {}, scrollPanel: {}, rail: { keepShow: true, }, bar: { hoverStyle: true, onlyShowBarOnScroll: false, // 是否只有滚动的时候才显示滚动条 background: '#F5F5F5', // 滚动条颜色 opacity: 1, // 滚动条透明度 'overflow-x': 'hidden', }, }, }; }, watch: { 'addTopicForm.topicType': function (newVal) { // 当题目类型变化时,触发相关字段的验证 this.$nextTick(() => { if (this.$refs.addTopicFormRef) { // 验证选项字段 if (newVal === 1) { this.$refs.addTopicFormRef.validateFields(['optionA', 'optionB', 'optionC', 'optionD']); } else { // 清除非必填字段的验证状态 this.$refs.addTopicFormRef.clearValidate(['optionA', 'optionB', 'optionC', 'optionD']); } } }); }, visible(newVal, oldVal) { if (!newVal) { this.restForm('form'); this.form.questionBankId = 0; this.checkedKeys = []; this.selectAuth = []; this.treeData = []; // 重置状态标志 this.isEdit = false; this.isAdd = false; } else { // 当抽屉打开时强制更新按钮状态 this.$nextTick(() => { this.$forceUpdate(); }); } }, }, mounted() { this.actionTitle = '操作'; this.getDict('position').then(res => { const dictMap = {}; res.data.forEach(item => { dictMap[item.dicValue] = item.dicDisplayName; }); this.positionDict = dictMap; }); this.getBankList(); }, methods: { // 获取字典数据方法 getDict(type) { return req('get', /dict/getDictItemByNo, { dicNo: type }) .then((res) => { if (res.result === 'success') { return res; } throw new Error(res.message || '获取字典数据失败'); }) .catch((error) => { console.error(获取${type}字典失败:, error); throw error; }); }, /* 新增题库 */ addBank() { this.visible = true; this.disabled = false; this.title = '新增题库'; // 获取功能权限树 req('get', '/bank/getTree', {}).then((res) => { this.treeData = res.data; }); // 初始化题目列表为空 this.topicList = []; this.totalTopicCount = 0; this.topicPageNum = 1; this.isEdit = false; // 不是编辑状态 this.isAdd = true; // 设置为新增状态 // 在新增状态下禁用导入和添加功能 this.importEnabled = false; this.addEnabled = false; // 强制更新按钮状态 this.$nextTick(() => { this.$forceUpdate(); }); }, // 查询 getSearch() { this.pageIndex = 1; this.getBankList(); }, /* 重置查询 */ restSearch(form) { this.restForm(form); this.pageIndex = 1; this.getBankList(); }, /* 删除题库 */ removeBank(record) { this.loading = true; req('post', '/bank/removeBQuestionBank', { questionBankId: record.questionBankId, }).then((res) => { this.loading = false; if (res.result === 'success') { this.$message.success(res.message); this.getBankList(); } }); }, downloadTemplate() { fileDownload('get', '/topic/downloadTemplate', null).then((res) => { const blob = new Blob([res], { type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', }); const link = document.createElement('a'); link.href = window.URL.createObjectURL(blob); link.download = '题库模板.xlsx'; link.click(); window.URL.revokeObjectURL(link.href); }).catch(() => { this.$message.error('下载失败'); }); }, beforeUpload(file) { // 显示加载状态 this.loading = true; const formData = new FormData(); formData.append('file', file); formData.append('questionBankId', this.form.questionBankId); // 添加 questionBankId 字段 req('post', '/topic/import', formData, { headers: { 'Content-Type': 'multipart/form-data', }, }) .then((res) => { // 隐藏加载状态 this.loading = false; if (res.result === 'success') { // 确保在DOM更新后再刷新题目列表 this.$nextTick(() => { // 刷新题目列表 this.getTopicList(this.form.questionBankId, this.topicPageNum, this.topicPageSize) .then(() => { this.$message.success('导入成功'); }) .catch(() => { this.$message.error('刷新题目列表失败'); }); }); } else { this.$message.error(res.message || '导入失败'); } }) .catch((error) => { // 隐藏加载状态 this.loading = false; this.$message.error('导入失败,请重试'); console.error('导入题目出错:', error); }); return false; // 阻止默认上传行为 }, // 获取题库下的题目列表(返回Promise以便链式调用) getTopicList(questionBankId, pageNum = 1, pageSize = 10) { return new Promise((resolve, reject) => { req('post', '/topic/list', { questionBankId, page: pageNum, rows: pageSize, }).then((res) => { if (res.result === 'success') { this.topicQX = res.QX; if (!this.topicQX.edit && !this.topicQX.delete) { this.hideAction(); } else { this.topicList = res.data.map((item, index) => ({ index: (pageNum - 1) * pageSize + index + 1, content: item.content, optionA: item.optionA, optionB: item.optionB, optionC: item.optionC, optionD: item.optionD, topicId: item.topicId, correctAnswer: item.correctAnswer, topicType: item.topicType, })); } // 更新总条数用于分页组件 this.totalTopicCount = res.page.totalResult; resolve(res); } else { this.$message.error(res.message || '获取题目列表失败'); reject(res); } }).catch((error) => { this.$message.error('获取题目列表失败'); reject(error); }); }); }, handleTopicPageChange(page) { this.topicPageNum = page; this.getTopicList(this.form.questionBankId, page, this.topicPageSize); }, // 获取选择题的选项 getOptions(topic) { if (topic.topicType === 1) { // 选择题:返回 A/B/C/D 选项 const options = []; if (topic.optionA) options.push({ key: 'A', value: topic.optionA }); if (topic.optionB) options.push({ key: 'B', value: topic.optionB }); if (topic.optionC) options.push({ key: 'C', value: topic.optionC }); if (topic.optionD) options.push({ key: 'D', value: topic.optionD }); return options; } else if (topic.topicType === 2) { // 判断题:直接返回 正确/错误 return [ { key: '正确', value: '正确' }, { key: '错误', value: '错误' }, ]; } return []; }, checkAnswer(topic, selectedAnswer) { // 仅记录用户选择的答案,不进行是否正确的判断 this.$set(topic, 'userAnswer', selectedAnswer); }, resetAddTopicForm() { this.addTopicForm = { content: '', topicType: 1, optionA: '', optionB: '', optionC: '', optionD: '', correctAnswer: '', }; }, saveNewTopic() { this.$refs.addTopicFormRef.validate((valid, fields) => { if (!valid) { console.log('表单验证失败:', fields); // 找出第一个错误字段并聚焦 const firstErrorField = Object.keys(fields).find(key => fields[key]); if (firstErrorField && this.$refs.addTopicFormRef) { const formItem = this.$refs.addTopicFormRef.$children.find( child => child.prop === firstErrorField, ); if (formItem && formItem.$el) { const input = formItem.$el.querySelector('input, select, textarea'); if (input) input.focus(); } } return; } // 验证通过,处理保存逻辑 const newTopic = { ...this.addTopicForm }; // 发送请求保存题目 req('post', '/topic/add', { questionBankId: this.form.questionBankId, optionA: newTopic.optionA, optionB: newTopic.optionB, optionC: newTopic.optionC, optionD: newTopic.optionD, correctAnswer: newTopic.correctAnswer, content: newTopic.content, topicType: newTopic.topicType, }).then((res) => { if (res.result === 'success') { this.$message.success('题目添加成功'); this.addTopicVisible = false; this.getTopicList(this.form.questionBankId); // 刷新题目列表 } else { this.$message.error(res.message || '保存失败'); } this.resetAddTopicForm(); }).catch((err) => { this.$message.error('网络异常,请重试'); }); }); }, /* 删除题库下的题目 */ removeQuestion(topicId) { this.$confirm({ title: '确认删除该题目?', content: '删除后将无法恢复', okText: '是', cancelText: '否', onOk: () => { req('post', '/topic/removeBTopic', { topicId, questionBankId: this.form.questionBankId, }).then((res) => { if (res.result === 'success') { this.$message.success(res.message); // 刷新题目列表 this.getTopicList(this.form.questionBankId, this.topicPageNum, this.topicPageSize); } else { this.$message.error(res.message || '删除失败'); } }); }, }); }, editAuth(record) { this.loading = true; req('post', '/bank/getBQuestionBank', { questionBankId: record.questionBankId, }).then((res) => { this.loading = false; if (res.result === 'success') { this.visible = true; this.disabled = true; this.title = '修改题库'; this.isEdit = true; // 设置为编辑状态 this.isAdd = false; // 不是新增状态 // 在编辑状态下启用导入和添加功能 this.importEnabled = true; this.addEnabled = true; // 强制更新按钮状态 this.$nextTick(() => { this.$forceUpdate(); }); const bank = res.data; this.$nextTick(() => { this.form.questionBankId = bank.questionBankId; this.form.title = bank.title; this.form.participateInPk = Boolean(bank.participateInPk); this.form.positionId = bank.positionId; this.treeData = bank.treeData; this.checkedKeys = bank.auths; // 获取题目列表 this.topicPageNum = 1; this.getTopicList(bank.questionBankId, this.topicPageNum, this.topicPageSize); }); } }); }, /* 保存or修改题库信息 */ submitForm() { this.$refs.form.validate((valid) => { if (valid) { this.form.participateInPk = this.form.participateInPk ? 1 : 0; const url = this.form.questionBankId ? 'edit' : 'add'; const selectAuth = this.selectAuth; this.form.selectAuth = JSON.stringify(selectAuth); this.submitLoading = true; req('post', /bank/${url}, this.form).then((res) => { if (res.result === 'success') { this.visible = false; this.getBankList(); // 如果是新增题库且成功,获取题目列表 if (!this.form.questionBankId && res.data && res.data.questionBankId) { this.form.questionBankId = res.data.questionBankId; this.topicPageNum = 1; this.getTopicList(res.data.questionBankId, this.topicPageNum, this.topicPageSize); // 新增成功后启用导入和添加功能 this.importEnabled = true; this.addEnabled = true; } this.$message.success(res.message); // 重置新增/编辑状态 this.isEdit = false; this.isAdd = false; } this.submitLoading = false; }); } }); }, /* 重置表单 */ restForm(form) { this.$refs[form].resetFields(); }, /* 改变页数事件 */ onChangePage(page, pageSize) { this.pageIndex = page; this.getBankList(); }, /* 改变每页显示条数 */ onShowSizeChange(current, pageSize) { this.pageIndex = 1; this.pageSize = pageSize; this.getBankList(); }, /* 题库信息列表 */ getBankList() { this.loading = true; this.searchForm.page = this.pageIndex; this.searchForm.rows = this.pageSize; req('post', '/bank/list', this.searchForm) .then((res) => { if (res.result === 'success') { this.dataList = res.data; this.QX = res.QX; // 无权限隐藏操作列 if (!this.QX.edit && !this.QX.delete) { this.hideAction(); } else if (columns[columns.length - 1].title != '操作') { columns.push(actionShow); } this.totalPage = res.page.totalResult; } this.loading = false; }).catch((error) => { this.loading = false; }); }, /* 无所有行操作权限时,隐藏操作栏 */ hideAction() { if (columns[columns.length - 1].title == '操作') { columns.splice(columns.length - 1, 1); } }, /* 校验代号类型 */ validCode(value) { if (value.length > 20) { value = value.slice(0, 20); } for (let i = value.length - 1; i >= 0; i--) { const unicode = value.charCodeAt(i); if (unicode > 65280 && unicode < 65375) { value = value.substr(0, i); } } this.value = value; }, }, }; const actionShow = { title: '操作', width: '200px', hide: true, dataIndex: 'action', key: 'action', align: 'center', scopedSlots: { customRender: 'action' }, }; const columns = [ { title: '序号', width: '50px', align: 'center', customRender: (text, row, index) => index + 1, }, { title: '题库名称', align: 'center', dataIndex: 'title', key: 'title', width: '120px', }, { title: '涉及岗位', align: 'center', dataIndex: 'positionName', key: 'positionName', width: '110px', }, { title: '题目数量', dataIndex: 'topicCount', key: 'topicCount', align: 'center', width: '180px', }, { title: '操作', width: '150px', hide: true, dataIndex: 'action', key: 'action', align: 'center', scopedSlots: { customRender: 'action' }, }, ]; </script> <style scoped> .topic-list-container { max-height: calc(100vh - 400px); /* 根据实际布局调整最大高度 */ overflow-y: auto; } .pagination-wrapper { position: sticky; bottom: 0; left: 0; right: 0; background: #fff; padding: 10px; z-index: 1; box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1); margin-top: 15px; } .topic-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; } .topic-item { border: 1px solid #e8e8e8; padding: 15px; border-radius: 4px; position: relative; /* 为绝对定位的子元素提供定位上下文 */ } .topic-content { font-size: 16px; margin-bottom: 10px; } .options label { display: block; margin: 5px 0; font-size: 14px; } .options input[type="radio"] { margin-right: 5px; } /* 按钮禁用状态样式优化 */ .ant-upload.ant-upload-disabled .ant-upload-list, .ant-btn[disabled] { cursor: not-allowed; opacity: 0.5; } .topic-delete { position: absolute; top: 10px; right: 10px; } </style> <style scoped> @import "../../../assets/css/maincss.css"; </style> 在编辑页面中选择某个题目的选项后,再次打开该题时,默认显示的是上次选择的选项而不是正确答案。修改此问题

<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>百度联想词搜索框</title> <style type="text/css"> * { padding: 0; margin: 0; } .content { position: absolute; margin-left: -260px; left: 50%; top: 30%; } #btn { width: 560px; padding: 10px 10px; border: 1px solid rgb(45, 129, 240); } #oUl,#oUl > li{ list-style: none; } #oUl a { text-decoration: none; color: rgb(45, 129, 240); } </style> </head> <body> <input type="text " id="btn"> <script type="text/javascript"> btn.onkeyup = function () { var value = this.value; if (value) { var oScript = document.createElement('script'); oScript.src = 'https://sp0.baidu.com/5a1Fazu8AA54nxGko9WTAnF6hhy/su?wd=' + value + '&cb=aa' document.body.appendChild(oScript); oScript.remove();//大家在之前会发现,随着你输入的东西越多,你创建的script标签就越多,我们在获取到它后直接移除即可。 } else if(value == 0){ oUl.style.display = 'none'; } } function aa(data) { oUl.style.display = 'block'; var list = data.s; var str = ''; if (list.length > 0) { list.forEach(function (ele, index) { str += '' + ele + ''; }) oUl.innerHTML = str; }else { oUl.style.display = 'none'; } } </script> </body> </html>



