前言：

本文基于在较为成熟完整的项目，进行甘特图模块开发的内容。并不涉及node相关下载、安装及vue的相关使用。

1 需安装的模块

npm install dhtmlx-gantt
npm install font-awesome

(1) dhtmlxgantt是进行甘特图开发过程中所用到的插件库，用于跨浏览器和跨平台应用程序的功能较为齐全的Gantt图表。其祖家组件为一个JavaScript库，提供了一套完整的Ajax驱动的UI组件。

(2)font-awesome为图标字体库和css框架。提供了各类css样式。

2 引入模块

    import { gantt } from 'dhtmlx-gantt';import "dhtmlx-gantt/codebase/dhtmlxgantt.css";import 'font-awesome/css/font-awesome.min.css';

（1）引用dhtmlxgantt.css样式，显示插件界面；

（2）引用font-awesome.min.css图标,为了显示各种图表插件。

3 设计页面格式内容

（1）前端展示界面设计：

//采用html5的el插件进行前端界面设计
<template>
//建立容器，在容器下存储界面样式与风格<div class="app-container">
//容器下设计gantt-container，用以装载甘特图界面的显示内容<div ref="gantt" class="gantt-container"></div>
//调用官方在线接口，设置摁钮方式实现甘特图导出（支持多种常见格式）<input value="导出PDF" type="button" onclick="gantt.exportToPDF()"/><input value="导出Excel" type="button" onclick='gantt.exportToExcel()'/><input value="导出Png" type="button" onclick="gantt.exportToPNG()"/><input value="载入execl" type="button" onclick="gantt.load()"/>//自动导入文件并解析为json格式，便于后续开发导入json数组自动生成甘特图。
<form action="https://export.dhtmlx.com/gantt" method="post"enctype="multipart/form-data"><input type="file" name="file" /><input type="" name="type" value="excel-parse"/><button type="submit">转为json文件</button></form></div>
</template>

（2）甘特图显示设计（请参考官方文件（内容很全只是为英文文档）：

界面示例，可在线编辑操作，便于学习：Gantt : Samples (dhtmlx.com)

官方学习文档：Gantt API Gantt Docs (dhtmlx.com)

一个网址讲解基本与官方文档一致较为详细：dhtmlxGantt使用教程：如何导出/导入Excel，导出到iCal-控件新闻-慧都网 (evget.com)

一个官方博客，里面解决一些较为复杂的问题，并有示例代码可在线编辑操作：

DHTMLX Blog - DHTMLX JavaScript Library - News, tips, and info.

<script>
import { gantt } from 'dhtmlx-gantt';
import "dhtmlx-gantt/codebase/dhtmlxgantt.js";
import "./api.js";
import "dhtmlx-gantt/codebase/ext/dhtmlxgantt_tooltip.js";
import "dhtmlx-gantt/codebase/ext/dhtmlxgantt_marker.js";
import "dhtmlx-gantt/codebase/locale/locale_cn.js";
import "dhtmlx-gantt/codebase/dhtmlxgantt.css";
import 'font-awesome/css/font-awesome.min.css';
export default {name: "gantt",data() {return {tasks: {data: []}}},created() {this.getList();},mounted() {const than = this;//自适应甘特图的尺寸大小, 使得在不出现滚动条的情况下, 显示全部任务gantt.config.autosize = true;//允许拖拽gantt.config.drag_project = true;//只读模式//gantt.config.readonly = true;//是否显示左侧树表格gantt.config.show_grid = true;//定义日期编辑器var dateEditor = gantt.config.editor_types.date;gantt.config.editor_types.end_date = gantt.mixin({set_value: function(value, id, column, node){var correctedValue = gantt.date.add(value, -1, "day");return dateEditor.set_value.apply(this, [correctedValue, id, column, node]);},get_value: function(id, column, node) {var selectedValue = dateEditor.get_value.apply(this, [id, column, node]);return gantt.date.add(selectedValue, 1, "day");},}, dateEditor);
//定义各种编辑器及类型var textEditor = {type: "text", map_to: "text"};var colorEditor = {type: "color", map_to: "color"};var progressEditor={type:"text",map_to:"progress"};var startDateEditor = {type: "date", map_to: "start_date"};var endDateEditor = {type: "date", map_to: "end_date"};var priorityEditor={type: "select", map_to: "priority", options:gantt.serverList("priority")};var durationEditor = {type: "number", map_to: "duration", min:0, max: 100};
//设置甘特图中各个列相关配置gantt.config.columns = [{name: 'text',/*height:'40',*/label: '项目名称',editor: textEditor,resize: true,tree: true,width: '230',}},{name: "add",label:"",width: 30},{name:'priority',align: "center",label: "优先级",width:50,editor: priorityEditor,resize:true,},{name: "color",align: "center",label: "颜色",width:40,editor: colorEditor,resize:true,},{name: 'start_date',label: '项目开始时间',align: "center",editor: startDateEditor,resize:true,tree: false,width: '100',},{name: 'end_date',label: '项目结束时间',width:100,align: 'center',editor: endDateEditor,resize: true,},{name: 'sDuration',label: '任务期',align: "center",editor: durationEditor,resize:true,tree: false,width: '55',template: function (obj) {return obj.duration + '天'},hide: false},{name: 'progress',label: '项目进度',align: "center",tree: false,editor: progressEditor,resize:true,width: '50',},]
//配置日期格式gantt.templates.task_end_date = function(date){return gantt.templates.task_date(new Date(date.valueOf() - 1));};var gridDateToStr = gantt.date.date_to_str("%Y-%m-%d");gantt.templates.grid_date_format = function(date, column){if(column === "end_date"){return gridDateToStr(new Date(date.valueOf() - 1));}else{return gridDateToStr(date);}}
//配置甘特图容器中的行列滚动条gantt.config.layout = {css: "gantt_container",cols: [{width: 680,min_width: 680,rows: [{view: "grid",scrollX: "gridScroll",scrollable: true,scrollY: "scrollVer"},{view: "scrollbar",id: "gridScroll",group: "horizontal"}]},{resizer: true,width: 1},{rows: [{view: "timeline",scrollX: "scrollHor",scrollY: "scrollVer"},{view: "scrollbar",id: "scrollHor",group: "horizontal"}]},{view: "scrollbar",id: "scrollVer"}]};
//配置颜色编辑器提供颜色选择gantt.config.editor_types.color = {show: function (id, column, config, placeholder) {var html = "<div><input type='color' name=''" + column.name + "></div>";placeholder.innerHTML = html;},hide: function () {},set_value: function (value, id, column, node) {this.get_input(node).value = value;},get_value: function (id, column, node) {return this.get_input(node).value || "";},is_changed: function (value, id, column, node) {var input = this.get_input(node);return input.value !== value;},get_input: function (node) {return node.querySelector("input");},is_valid: function (value, id, column, node) {var input = this.get_input(node);return !!input.value;},focus: function (node) {var input = this.get_input(node);input.focus();}}
//配置时间规模，右上方日历gantt.config.subscales = [{unit: "year",step: 1,format: "%Y",template: weekScaleTemplate,},{unit: "day",step: 1,format: "%D",template:daysStyle,}];// 初始化gantt.init(this.$refs.gantt)// 数据解析gantt.parse(this.tasks)//设置任务条进度内容gantt.templates.progress_text = function (start, end, task) {return "<div style='text-align:left;color:#fff;padding-left:20px'>" + Math.round(task.progress) +"% </div>";};//任务条显示内容gantt.templates.task_text = function (start, end, task) {return "<div style='text-align:center;color:#fff'>" + task.text + '(' + task.duration + '天)' +"</div>";}//任务条上的文字大小 以及取消border自带样式gantt.templates.task_class = function (start, end, item) {return item.$level == 0 ? 'firstLevelTask' : 'secondLevelTask'}//gantt图任务悬浮窗位置gantt.config.tooltip_offset_x = 10;gantt.config.tooltip_offset_y = 30;//激活列表展开、折叠功能gantt.config.open_split_tasks = true;//创建新事件通过点击”+“打开灯箱gantt.config.details_on_create = true;//甘特图图表宽度自适应gantt.config.autofit = true;//用户可以通过拖拽调整行高gantt.config.resize_rows = true;//图标项目栏可以任意拖拽gantt.config.order_branch = true;gantt.config.order_branch_free = true;//新增空白列后新增项目gantt.config.placeholder_task = true;//图标刷新后位置不变gantt.config.preserve_scroll = true;gantt.config.round_dnd_dates = true;//设置甘特图表头高度gantt.config.scale_height = 100;//是否显示依赖连线(取消)gantt.config.show_links = true;//点击表头可排序gantt.config.sort = true;//允许拖放gantt.config.drag_project = true;// 初始化gantt.init(this.$refs.gantt)// 数据解析gantt.parse(this.tasks)gantt.exportToExcel({name: "document.xlsx",columns: [{id: "text", header: "Title", width: 150},{id: "start_date", header: "Start date", width: 250, type: "date"}],server: "https://myapp.com/myexport/gantt",visual: true,cellColors: true,data: {},date_format: "dddd d, mmmm yyyy"});gantt.exportToPNG({name: "gantt.png",      locale: "cn",    data: {},     server: "https://export.dhtmlx.com/gantt",raw: false,callback: function (res) {alert(res.gantt);}});gantt.exportToPDF({name: "gantt.pdf",      locale: "cn",skin: 'terrace',data: [],server: "https://myapp.com/myexport/gantt",raw: false,callback: function (res) {alert(res.data);}})// 初始化gantt.init(this.$refs.gantt)// 数据解析gantt.parse(this.tasks)//表格列宽自适应gantt.config.autofit=true;//r任务或者连线拖拽到浏览器屏幕外时，自动触发滚动效果gantt.config.autoscroll=true;//时间轴图表中，任务条形图的高度gantt.config.task_height = 28//时间轴图表中，甘特图的高度gantt.config.row_height = 36//时间轴图表中，如果不设置，只有行边框，区分上下的任务，设置之后带有列的边框，整个时间轴变成格子状。gantt.config.show_task_cells = true//当task的长度改变时，自动调整图表坐标轴区间用于适配task的长度gantt.config.fit_tasks = true;gantt.config.min_column_width = 40;gantt.config.auto_types = true;gantt.config.xml_date = "%Y-%m-%d";gantt.config.scale_unit = "month";gantt.config.step = 1;gantt.config.date_scale = "%Y年%M";gantt.config.start_on_monday = true;gantt.config.scale_height = 90;gantt.config.autoscroll = true;gantt.config.calendar_property = "start_date";gantt.config.calendar_property = "sPend";gantt.config.readonly = true;// 初始化gantt.init(this.$refs.gantt)// 数据解析gantt.parse(this.tasks)gantt.i18n.setLocale('cn');// 初始化gantt.init(this.$refs.gantt)// 数据解析gantt.parse(this.tasks)

(3)关于css样式渲染甘特图界面

<style lang="scss">
.firstLevelTask {border: none;.gantt_task_content {font-size: 13px;}
}.secondLevelTask {border: none;
}.weekend{background: #f4f7f4 !important;
}
.gantt_selected .weekend{background: #f7eb91 !important;
}.thirdLevelTask {border: 2px solid #da645d;color: #da645d;background: #da645d;
}.milestone-default {border: none;background: rgba(0, 0, 0, 0.45);
}.milestone-unfinished {border: none;background: #5692f0;
}.milestone-finished {border: none;background: #84bd54;
}.milestone-canceled {border: none;background: #da645d;
}html,
body {margin: 0px;padding: 0px;height: 100%;overflow: hidden;
}
.task-color-cell{margin:10%;width:20px;height:20px;border:1px solid #cecece;display:inline-block;border-radius:20px;
}.container {height: 100%;width: 100%;position: relative;.gantt_grid_head_cell {padding-left: 20px;text-align: left !important;font-size: 14px;color: #333;}.select-wrap {position: absolute;top: 25px;z-index: 99;width: 90px;left: 180px;.el-input__inner {border: none;}}.left-container {height: 100%;}.parent {.gantt_tree_icon {&.gantt_folder_open {// background-image: url(../../../../assets/icons/tree-table.svg) !important;}&.gantt_folder_closed {// background-image: url(../../../../assets/icons/documentation.svg) !important;}}}.green,.yellow,.pink,.popular {.gantt_tree_icon.gantt_file {background: none;position: relative;&::before {content: "";width: 10px;height: 10px;border-radius: 50%;position: absolute;left: 50%;top: 50%;transform: translate(-50%, -50%);}}}.green {.gantt_tree_icon.gantt_file {&::before {background: #84bd54;}}}.yellow {.gantt_tree_icon.gantt_file {&::before {background: #fcca02;}}}.pink {.gantt_tree_icon.gantt_file {&::before {background: #da645d;}}}.popular {.gantt_tree_icon.gantt_file {&::before {background: #d1a6ff;}}}}.left-container {height: 100%;
}.gantt_task_content {text-align: left;padding-left: 10px;
}#gantt_here{width: 100vw;height: 100vh;
}.fa {cursor: pointer;font-size: 14px;text-align: center;opacity: 0.2;padding: 5px;
}.fa:hover {opacity: 1;
}.fa-pencil {color: #ffa011;
}.fa-plus {color: #328EA0;
}.fa-times {color: red;
}.weekend{background: #f4f7f4;
}
.gantt_selected .weekend{background: #f7eb91;
}</style>

最终实现风格如下：

其中支持文本字样可编辑、日期点击弹出日历可选择日期、不同任务选择不同颜色，自动显示进度，进度条总工期和当下进展用深浅色显示。

同时支持png\pdf/execl/等文件导出。