admin 管理员组

文章数量: 1086019

I'm trying to use Element.getBoundingClientRect() to get the x, y, top, left value of dom element.

const editorRef = useRef() 
... // attatched editor ref on the dom element that I'm interested
... 
editorRef.current.focus() // works well 
const editorNodeRect = editorRef.current.getBoundingClientRect() // got error saying getBoundingClientRect() is not a function

so I tried this way by select the node by query 

const editorNodebyQuery =document.querySelectorAll(".DraftEditor-root")[0];
const editorNodebyQueryRect = editorNodebyQuery.getBoundingClientRect() // work well!!

but I don't like to access the dom node by query.. I think it's heavy.. I want to use the useRef.

first rootEditorNode is what I got by querySelector and it have getBoundingClientRect() function second editorRef.current is what i got by useRef and it doesnt have getBoundingClientRect() funcion.

I just want to know how to use getBoundingClientRect() function with useRef()

I'm trying to use Element.getBoundingClientRect() to get the x, y, top, left value of dom element.

const editorRef = useRef() 
... // attatched editor ref on the dom element that I'm interested
... 
editorRef.current.focus() // works well 
const editorNodeRect = editorRef.current.getBoundingClientRect() // got error saying getBoundingClientRect() is not a function

so I tried this way by select the node by query 

const editorNodebyQuery =document.querySelectorAll(".DraftEditor-root")[0];
const editorNodebyQueryRect = editorNodebyQuery.getBoundingClientRect() // work well!!

but I don't like to access the dom node by query.. I think it's heavy.. I want to use the useRef.

first rootEditorNode is what I got by querySelector and it have getBoundingClientRect() function second editorRef.current is what i got by useRef and it doesnt have getBoundingClientRect() funcion.

I just want to know how to use getBoundingClientRect() function with useRef()

  • javascript
  • reactjs
  • dom
  • react-hooks
Share Improve this question asked Mar 7, 2020 at 4:48 byyoungbyyoung 3971 gold badge3 silver badges12 bronze badges 1
  • Can you please provide the full relevant code? The strategy you are describing should work fine (as demonstrated in this codesandbox). – mgarcia Commented Mar 7, 2020 at 12:34
Add a ment  | 

1 Answer 1

Reset to default 5

Most probably your editorRef is pointing to a React ponent than a DOM element. you can get the element like this

var element=ReactDOM.findDOMNode(editorRef.current);
var rect =element.getBoundingClientRect();

but ReactDOM.findDOMNode is deprecated in strict mode(remended to use)

<React.StrictMode></React.StrictMode>

so better way is to use forwardRef if you have access to the Child Component, another option is use a wrapper div which wraps the Child Component and use useRef like this

<div ref={editorRef} >
<ChildComp/>
</div>

this will allow you to access getBoundingClientRect() might return wrong size(rect.top 0, rect.height 0 etc) in that case you need to call it with a delay

useEffect(() => {

setTimeout(() => {
   var rect = editorRef.current.getBoundingClientRect();
}, 300);

  }, [ ]);

本文标签：

Error[2]: Invalid argument supplied for foreach(), File: /www/wwwroot/roclinux.cn/tmp/view_template_quzhiwa_htm_read.htm, Line: 58
File: /www/wwwroot/roclinux.cn/tmp/route_read.php, Line: 205, include(/www/wwwroot/roclinux.cn/tmp/view_template_quzhiwa_htm_read.htm)
File: /www/wwwroot/roclinux.cn/tmp/index.inc.php, Line: 129, include(/www/wwwroot/roclinux.cn/tmp/route_read.php)
File: /www/wwwroot/roclinux.cn/index.php, Line: 29, include(/www/wwwroot/roclinux.cn/tmp/index.inc.php)

版权声明：本文标题：javascript - How to get actual Dom node with React.useRef ? Element.getBoundingClientRect() not working on useRef variable - Sta 内容由网友自发贡献，该文观点仅代表作者本人， 转载请联系作者并注明出处：http://roclinux.cn/p/1744022574a2520067.html， 本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌抄袭侵权/违法违规的内容，一经查实，本站将立刻删除。