// 去掉export function，写内部方法
export default {
    methods: {
      treeRenderContent(h, params) {
        const { root, node, data } = params;
        const icon0 = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABIAAAASCAYAAABWzo5XAAAAAXNSR0IArs4c6QAAAKJJREFUOE9jZKASYKSSOQzUN+j/QaH7DAwMCmgufMDw758jo+OHB4RcDnfR/4NC/3EovsDAyPgBh9wDRru3iSA5VIOkMxgYeHQIWQ6R/3CUgeHlcgZG+3dgMxAGnVT+zyAVz8DAIUecQT8eMTA8W8jAaH4XzaDrjri8htdgRs39owYRCPqhEUbYsgihNPWAUXO/IkqCJKSDkDz1cz8hGwnJAwCJjEAToczWhwAAAABJRU5ErkJggg==';
        const iconOther = 'data:image/png;base64,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';
  
        return h('span', [
          h('img', {
            attrs: {
              src: node.nodeKey == 0 ? icon0 : iconOther
            },
            style: 'width: 16px; height: 16px;vertical-align: sub;'
          }),
          h('span', {
            style: {
              display: 'inline-block',
              cursor: "pointer",
              backgroundColor: node.node.selected ? "#e5e5e5" : ""
            },
            onClick: (e) => {
                e.stopPropagation();
                this.$emit("on-tree-change", node.node);
            }
          }, data.title)
        ]);
      }
    }
  }