Monaco editor dynamically resizable

问题

I have been searching for a discussion about if it's possible to mimic the html tag textarea's resizing when using Monaco Editor's field all over the Internet but I couldn't find one answering my question.

I'm using the monaco-editor npm package in a React application. Do you have any idea if this is easy to implement?

Thank you in advance!

SOLUTION
With pure css I selected the target html element and just added these properties:

div {
  resize: vertical;
  overflow: auto;
}

回答1:

TL;DR: add automaticLayout: true to your editor's configuration.

NL;PR:

Monaco has a built-in auto resize to parent container functionality:

React >= 16.3.0 (Recommended)

constructor(props){super(props); this.ref = React.createRef();}

render(){
 return <div ref={this.editorDiv} className="editor" ></div>
}

componentDidMount(){
 let editor = monaco.editor.create(this.editorDiv.current, {
        value: "var x = 0;",
        language: 'javascript',
        automaticLayout: true // the important part
      });
}

React<16.3.0

render(){
 return <div ref={el=>{this.editorDiv = el}} className="editor" ></div>
}
 // I use this configuration in the editor:
componentDidMount(){
 let editor = monaco.editor.create(this.editorDiv, {
        value: "var x = 0;",
        language: 'javascript',
        automaticLayout: true // the important part
      });
}

And the CSS for the editor (it avoids rendering the editor for the first time with like 10px height):

.editor{
 height: 100%;
}

Monaco Version: ^0.10.1, last tested: 0.12.0

Note: The mechanism does not listen to its container size changes, it polls them.

回答2:

if you have a reference to the editor you can just call editor.layout() on some resize event. For example, on window resize:

window.onresize = function (){
    editor.layout();
};

Hope this helps.

回答3:

In my case I'm using that exact CSS but although automaticLayout: true works, I found out overkill (seems to pooling the DOM 100ms interval and I have several editors opened in the document. SO I ended up implementing it manually :

just in case , my needs are different: I want the user to resize it the container - in a standard way and cheap (both on code and performance) on libraries and performance. This is what I did:

css container : resize: vertical; overflow: auto

and this js :

function installResizeWatcher(el, fn, interval){
  let offset = {width: el.offsetWidth, height: el.offsetHeight}
  setInterval(()=>{
    let newOffset = {width: el.offsetWidth, height: el.offsetHeight}
    if(offset.height!=newOffset.height||offset.width!=newOffset.width){
      offset = newOffset
      fn()
    }
  }, interval)
}
  const typeScriptCodeContainer = document.getElementById('typeScriptCodeContainer')
  typeScriptCodeEditor = monaco.editor.create(typeScriptCodeContainer, Object.assign(editorOptions, {value: example.codeValue}))
  installResizeWatcher(typeScriptCodeContainer, typeScriptCodeEditor.layout.bind(typeScriptCodeEditor), 2000)

yes, 2 seconds interval and make sure it registers only once. I see there is / was a resize interval on 100ms for the automatic relayout in monaco - IMHO that's too much.

See it in action: https://typescript-api-playground.glitch.me/?example=2

回答4:

this is old question but get the problem to and solved it with react-resize-detector

based on ResizeObserver it feet perfectly to the need (check browser compatibility)

Exemple of component :

import React, { Component } from 'react';
import ReactResizeDetector from 'react-resize-detector';
import * as monaco from 'monaco-editor';

class Editor extends Component {
    constructor(props) {
        super(props)

        this.state = {
            width: 0,
            height: 0,
        }
        this.editor_div = React.createRef()

        this.handle_rezise = this.handle_rezise.bind(this);
    }

    componentDidMount() {
        const editor_model = monaco.editor.createModel('', 'sql');
        this.monaco_editor = monaco.editor.create(this.editor_div.current, this.props.editorOptions);
        this.monaco_editor.setModel(editor_model);
    }

    componentWillUnmount() {
        this.monaco_editor && this.monaco_editor.dispose();
    }

    handle_rezise(width, height) {
        this.monaco_editor.layout({ height, width });
    }

    render() {
        return(
            <div 
                className="editor-container"
                style={{ height: '100%' }}>
                <ReactResizeDetector
                    handleWidth
                    handleHeight
                    onResize={ this.handle_rezise }
                    refreshMode="debounce"
                    refreshRate={100} />
                <div 
                    className="editor"
                    ref={ this.editor_div }
                    style={{ height: '100%' }} />
            </div>
        )
    }
}

export default Editor;

Hope it's help

来源：https://stackoverflow.com/questions/47017753/monaco-editor-dynamically-resizable

标签

javascript

node.js

reactjs

monaco-editor