需求:选择下拉框内容,光标处加入下拉框内容,然后清空下拉框

界面:

在内容中输入,然后下拉框中选择内容,输入框中自动加上{下拉框选的内容},然后清空下拉框.

具体代码实现为:

		<el-input
            v-model="form.text"
            type="textarea"
            maxlength="4000"
            size="mini"
            rows="6"
            @change="handleChangeContent"
            @blur="campaignNameBlur"
          ></el-input>
          
		<el-select
            v-model="form.textVariable"
            placeholder="变量"
            class="ml-10"
            size="mini"
            @change="handleChangeContent"
          >
            <el-option v-for="item in textOptions" :key="item.value" :label="item.label" :value="item.value">
            </el-option>
          </el-select>

	/**
     * @description 获取焦点事件
     */
    campaignNameBlur(e) {
      this.campaignNameIndex = e.srcElement.selectionStart;
    },

	/**
     * @description 改变内容后面下拉框的时候
     */
    handleTextVariable(val) {
      if (this.form.text) {
        let index = this.campaignNameIndex;
        let name = this.form.text;
        this.form.text = name.slice(0, index) + `{${val}}` + name.slice(index);
      } else {
        this.form.text = `{${val}}`;
      }
    }

 
	/**
     * @description 改变通知设置的内容
     */
    handleChangeContent() {
      let content;
      if (this.form.textVariable) {
        this.handleTextVariable(this.form.textVariable);
        this.form.textVariable = '';
      }
      //加载到xml中  不需要的可以去掉
      content = `${this.form.text}`;
      this.updateCurrentExtensions(
        'flowable:Field',
        this.bpmnInstances.moddle.create('flowable:Field', {name: 'content', string: content}),
        'content'
      );
    },

有一个更简单的demo 比这个少一些交互
参考链接