vue中使用go.js实现ER图(节点下拉展示)并去除插件水印_vue er图

效果图（可拖拽）：

第一步：下载go.js文件

直接通过 Go.js（直接右击保存链接到本地）

第二步：引入

（1）将下载好的js文件放入vue项目中的static文件夹下

 （2）在index.html中引入

 <script src="/static/go.js"></script>

 第三步：使用

test.vue

<!--
 @description：
 @date：Created in  2021/12/9 18:51
 @modified By：
 @version: 1.0.0
   -->
<template>
    <div class="example">
        <div id="my-diagram-div"></div>
        <div></div>
    </div>
</template>
 
<script>
export default {
    name: "example",
    data() {
        return {};
    },
    mounted() {
        this.test();
    },
    methods: {
        
        test() {
            let $ = go.GraphObject.make; // for conciseness in defining templates
            let myDiagram = $(
                go.Diagram,
                "my-diagram-div", // id挂载dome节点
                {
                    allowDelete: false,
                    allowCopy: false,
                    layout: $(go.ForceDirectedLayout),
                    "undoManager.isEnabled": true,
                }
            );
            var colors = {
                'red': '#be4b15',
                'green': '#52ce60',
                'blue': '#6ea5f8',
                'lightred': '#fd8852',
                'lightblue': '#afd4fe',
                'lightgreen': '#b9e986',
                'pink': '#faadc1',
                'purple': '#d689ff',
                'orange': '#fdb400',
            }
            // the template for each attribute in a node's array of item data
            var itemTempl =
                $(go.Panel, "Horizontal",
                    $(go.Shape,
                        { desiredSize: new go.Size(15, 15), strokeJoin: "round", strokeWidth: 3, stroke: null, margin: 2 },
                        new go.Binding("figure", "figure"),
                        new go.Binding("fill", "color"),
                        new go.Binding("stroke", "color")),
                    $(go.TextBlock,
                        {
                            stroke: "#333333",
                            font: "bold 14px sans-serif"
                        },
                        new go.Binding("text", "name"))
                );
            // define the Node template, representing an entity
            myDiagram.nodeTemplate =
                $(go.Node, "Auto",  // the whole node panel
                    {
                        selectionAdorned: true,
                        resizable: true,
                        layoutConditions: go.Part.LayoutStandard & ~go.Part.LayoutNodeSized,
                        fromSpot: go.Spot.AllSides,
                        toSpot: go.Spot.AllSides,
                        isShadowed: true,
                        shadowOffset: new go.Point(3, 3),
                        shadowColor: "#C5C1AA"
                    },
                    new go.Binding("location", "location").makeTwoWay(),
                    // whenever the PanelExpanderButton changes the visible property of the "LIST" panel,
                    // clear out any desiredSize set by the ResizingTool.
                    new go.Binding("desiredSize", "visible", function (v) { return new go.Size(NaN, NaN); }).ofObject("LIST"),
                    // define the node's outer shape, which will surround the Table
                    $(go.Shape, "RoundedRectangle",
                        { fill: 'white', stroke: "#eeeeee", strokeWidth: 3 }),
                    $(go.Panel, "Table",
                        { margin: 8, stretch: go.GraphObject.Fill },
                        $(go.RowColumnDefinition, { row: 0, sizing: go.RowColumnDefinition.None }),
                        // the table header
                        $(go.TextBlock,
                            {
                                row: 0, alignment: go.Spot.Center,
                                margin: new go.Margin(0, 24, 0, 2),  // leave room for Button
                                font: "bold 16px sans-serif"
                            },
                            new go.Binding("text", "key")),
                        // the collapse/expand button
                        $("PanelExpanderButton", "LIST",  // the name of the element whose visibility this button toggles
                            { row: 0, alignment: go.Spot.TopRight }),
                        // the list of Panels, each showing an attribute
                        $(go.Panel, "Vertical",
                            {
                                name: "LIST",
                                row: 1,
                                padding: 3,
                                alignment: go.Spot.TopLeft,
                                defaultAlignment: go.Spot.Left,
                                stretch: go.GraphObject.Horizontal,
                                itemTemplate: itemTempl
                            },
                            new go.Binding("itemArray", "items"))
                    )  // end Table Panel
                );  // end Node
 
            // define the Link template, representing a relationship
            myDiagram.linkTemplate =
                $(go.Link,  // the whole link panel
                    {
                        selectionAdorned: true,
                        layerName: "Foreground",
                        reshapable: true,
                        routing: go.Link.AvoidsNodes,
                        corner: 5,
                        curve: go.Link.JumpOver
                    },
                    $(go.Shape,  // the link shape
                        { stroke: "#303B45", strokeWidth: 2.5 }),
                    $(go.TextBlock,  // the "from" label
                        {
                            textAlign: "center",
                            font: "bold 14px sans-serif",
                            stroke: "#1967B3",
                            segmentIndex: 0,
                            segmentOffset: new go.Point(NaN, NaN),
                            segmentOrientation: go.Link.OrientUpright
                        },
                        new go.Binding("text", "text")),
                    $(go.TextBlock,  // the "to" label
                        {
                            textAlign: "center",
                            font: "bold 14px sans-serif",
                            stroke: "#1967B3",
                            segmentIndex: -1,
                            segmentOffset: new go.Point(NaN, NaN),
                            segmentOrientation: go.Link.OrientUpright
                        },
                        new go.Binding("text", "toText"))
                );
 
            // create the model for the E-R diagram
            var nodeDataArray = [
                {
                    key: "Products",
                    items: [{ name: "ProductID", iskey: true, figure: "Decision", color: colors.red },
                    { name: "ProductName", iskey: false, figure: "Hexagon", color: colors.blue },
                    { name: "SupplierID", iskey: false, figure: "Decision", color: "purple" },
                    { name: "CategoryID", iskey: false, figure: "Decision", color: "purple" }]
                },
                {
                    key: "Suppliers",
                    items: [{ name: "SupplierID", iskey: true, figure: "Decision", color: colors.red },
                    { name: "CompanyName", iskey: false, figure: "Hexagon", color: colors.blue },
                    { name: "ContactName", iskey: false, figure: "Hexagon", color: colors.blue },
                    { name: "Address", iskey: false, figure: "Hexagon", color: colors.blue }]
                },
                {
                    key: "Categories",
                    items: [{ name: "CategoryID", iskey: true, figure: "Decision", color: colors.red },
                    { name: "CategoryName", iskey: false, figure: "Hexagon", color: colors.blue },
                    { name: "Description", iskey: false, figure: "Hexagon", color: colors.blue },
                    { name: "Picture", iskey: false, figure: "TriangleUp", color: colors.pink }]
                },
                {
                    key: "Order Details",
                    items: [{ name: "OrderID", iskey: true, figure: "Decision", color: colors.red },
                    { name: "ProductID", iskey: true, figure: "Decision", color: colors.red },
                    { name: "UnitPrice", iskey: false, figure: "Circle", color: colors.green },
                    { name: "Quantity", iskey: false, figure: "Circle", color: colors.green },
                    { name: "Discount", iskey: false, figure: "Circle", color: colors.green }]
                },
            ];
            var linkDataArray = [
                { from: "Products", to: "Suppliers", text: "0..N", toText: "1" },
                { from: "Products", to: "Categories", text: "0..N", toText: "1" },
                { from: "Order Details", to: "Products", text: "0..N", toText: "1" }
            ];
            myDiagram.model = $(go.GraphLinksModel,
                {
                    copiesArrays: true,
                    copiesArrayObjects: true,
                    nodeDataArray: nodeDataArray,
                    linkDataArray: linkDataArray
                });
        }
    },
};
</script>
 
<style scoped>
#my-diagram-div {
    width: 1000px;
    height: 800px;
}
</style>

完成之后发现有水印

 第四步：去除水印

（1）在go.js文件中全局搜索si()函数，注意：括号是英文的，且与si中间没有空格。

（2）搜索后一共2个搜索结果，找到si()函数的这个方法，将下图红框处注释掉即可

 注释掉之后，保存

 就没了

 这个插件挺好的，我看里面种类齐全，适合项目中需要画流程图、分组关系图、电路图等都可以使用。