React 中点击子元素调用父事件监听器

Question

我正在做一个搜索输入，人们可以在其中寻找技能，然后从选项中选择一项技能。 但是，当我单击任何选项时，它会调用父元素的事件侦听器（ onBlur={() => setIsFocus(false)} ）。 当我删除此事件侦听器时，它会添加一项新技能，但当它存在时，它不会运行附加到子元素的 function。

我尝试将e.stopPropagtion()添加到子元素中，但没有用。

我的代码：

import { useRef, useState } from "react"

import fetchSkills from "../api"
import BaseInput from "../components/reusable/BaseInput"
import SkillsSuggestionList from "../components/solutions/SkillsSuggestionList"
import Icons from "../components/SvgIcons/Icons"
import { debounce } from "../utils/shared"

const SKILLS = [
  { name: "html" },
  { name: "css" },
  { name: "javascript" },
  { name: "bootstrap" },
  { name: "tailwind-css" },
  { name: "react" },
  { name: "vue" },
  { name: "angular" },
]

const SolutionForm = () => {
  const [skills, setSkills] = useState([])
  const [isFocus, setIsFocus] = useState(false)
  const selectRef = useRef(null)

  // fetch skills and render them in a SkillsSuggestionList component
  const handleSelectChange = async (e) => {
    const { value } = e.target

    if (value.length > 2) {
      const result = await fetchSkills(value)
      setSkills(result.items)
    }
  }

  const addSkill = (skill) => {
      setData({
        ...data,
        skills: [...data.skills, skill],
      })
    setIsFocus(false)
    setSkills([])
    selectRef.current.value = ""
  }

  return (
    <div>
      <div>
        <form onSubmit={handleSubmit}>
              <div
                key={input.name}
                onBlur={() => setIsFocus(false)} // this is a parent event listener
              >
                <div
                  key={input.name}
                >
                  <ul>
                    {data.skills.map((skill, index) => (
                      <li key={index}>
                          {skill}
                      </li>
                    ))}
                  </ul>
                  <BaseInput
                    onChange={debounce(handleSelectChange, 500)}
                    onFocus={() => setIsFocus(true)}
                    name={input.name}
                    innerRef={selectRef}
                  />
                </div>
                {isFocus && (
                  <SkillsSuggestionList
                    skills={skills.length > 0 ? skills : SKILLS}
                    addSkill={addSkill}
                  />
                )}
              </div>
        </form>
      </div>
    </div>
  )
}

export default SolutionForm

技能建议列表组件：

const SkillsSuggestionList = ({ skills, addSkill }) => {
  return (
    <ul
      id="skills"
    >
      {skills.map((skill) => (
        <li
          onClick={(e) => { // this is a child event listener
            e.stopPropagation()
            addSkill(skill.name)
          }}
          key={skill.name}
        >
          {skill.name}
        </li>
      ))}
    </ul>
  )
}

export default SkillsSuggestionList

Answer 1

使用 onMouseDown 而不是 onClick 就可以了。

{skills.map((skill) => (
        <li
          onMouseDown={(e) => { // this is a child event listener
            // e.stopPropagation() <--- this won't be needed
            addSkill(skill.name)
          }}
          key={skill.name}
        >
          {skill.name}
        </li>
      ))}

另外，让我解释一下为什么这里需要 onMouseDown 。 当您单击列表时，在 onClick 运行之前它会变模糊并且 function 不再可用。 因此，当您使用 onMouseDown 时，它会首先运行 addSkill function 然后对其进行模糊处理。 希望它会起作用。