Fix：修复自定义节点内容时，二次创建根实例时节点内容不渲染的问题

simple-mind-map/index.js

@@ -7,9 +7,9 @@ import Style from './src/core/render/node/Style'
 import KeyCommand from './src/core/command/KeyCommand'
 import Command from './src/core/command/Command'
 import BatchExecution from './src/utils/BatchExecution'
-import { layoutValueList, CONSTANTS } from './src/constants/constant'
+import { layoutValueList, CONSTANTS, commonCaches } from './src/constants/constant'
 import { SVG } from '@svgdotjs/svg.js'
-import { simpleDeepClone } from './src/utils'
+import { simpleDeepClone, getType } from './src/utils'
 import defaultTheme, { checkIsNodeSizeIndependenceConfig } from './src/themes/default'
 import { defaultOpt } from './src/constants/defaultOptions'
 
@@ -35,6 +35,9 @@ class MindMap {
     // 初始化主题
     this.initTheme()
 
+    // 初始化缓存数据
+    this.initCache()
+
     // 事件类
     this.event = new Event({
       mindMap: this
@@ -129,6 +132,23 @@ class MindMap {
     this.event.off(event, fn)
   }
 
+  // 初始化缓存数据
+  initCache() {
+    Object.keys(commonCaches).forEach((key) => {
+      let type = getType(commonCaches[key])
+      let value = ''
+      switch(type) {
+        case 'Boolean':
+          value = false
+          break
+        default:
+          value = null
+          break
+      }
+      commonCaches[key] = value
+    })
+  }
+
   //  设置主题
   initTheme() {
     // 合并主题配置

simple-mind-map/src/constants/constant.js

@@ -325,3 +325,8 @@ export const nodeDataNoStylePropList = [
   'uid',
   'activeStyle'
 ]
+
+// 数据缓存
+export const commonCaches = {
+  measureCustomNodeContentSizeEl: null
+}

simple-mind-map/src/core/render/node/nodeCreateContents.js

@@ -1,7 +1,7 @@
 import { measureText, resizeImgSize, getTextFromHtml } from '../../../utils'
 import { Image, SVG, A, G, Rect, Text, ForeignObject } from '@svgdotjs/svg.js'
 import iconsSvg from '../../../svg/icons'
-import { CONSTANTS } from '../../../constants/constant'
+import { CONSTANTS, commonCaches } from '../../../constants/constant'
 
 //  创建图片节点
 function createImgNode() {
@@ -293,20 +293,19 @@ function createNoteNode() {
 }
 
 // 测量自定义节点内容元素的宽高
-let warpEl = null
 function measureCustomNodeContentSize (content) {
-  if (!warpEl) {
+  if (!commonCaches.measureCustomNodeContentSizeEl) {
-    warpEl = document.createElement('div')
+    commonCaches.measureCustomNodeContentSizeEl = document.createElement('div')
-    warpEl.style.cssText = `
+    commonCaches.measureCustomNodeContentSizeEl.style.cssText = `
       position: fixed;
       left: -99999px;
       top: -99999px;
     `
-    this.mindMap.el.appendChild(warpEl)
+    this.mindMap.el.appendChild(commonCaches.measureCustomNodeContentSizeEl)
   }
-  warpEl.innerHTML = ''
+  commonCaches.measureCustomNodeContentSizeEl.innerHTML = ''
-  warpEl.appendChild(content)
+  commonCaches.measureCustomNodeContentSizeEl.appendChild(content)
-  let rect = warpEl.getBoundingClientRect()
+  let rect = commonCaches.measureCustomNodeContentSizeEl.getBoundingClientRect()
   return {
     width: rect.width,
     height: rect.height

simple-mind-map/src/utils/index.js

@@ -461,3 +461,8 @@ export const removeHTMLEntities = (str) => {
   })
   return str
 }
+
+// 获取一个数据的类型
+export const getType = (data) => {
+  return Object.prototype.toString.call(data).slice(7, -1)
+}