How to implement asynchronous option loading and updating in wangEditor v4 version SelectMenu?

Detailed explanation of wangEditor v4 SelectMenu asynchronous loading options

This article introduces how to implement asynchronous options loading and updating of the SelectMenu component in the wangEditor v4 version. Assume that the option data comes from the backend interface.

The key lies in options initialization in the SelectMenu constructor, the implementation of the getOptions method, and the asynchronous acquisition of data and update options and refresh the editor view.

step:

1. Initialize options: In the constructor of SelectMenu , initialize options to an empty array: this.options = [];

2. Implement the getOptions method: This method returns the current options array for use by SelectMenu.

3. Asynchronously obtain and update options: Use async/await or Promise to call the backend interface to obtain option data. After successful acquisition, assign the data to this.options and call this.editor.change() to force the editor view to update.

Code example:

 class CustomSelectMenu extends wangEditor.SelectMenu {
    constructor(editor) {
        super(editor);
        this.title = 'Custom Selection Menu';
        this.iconSvg = '<svg> ...</svg> '; // Custom icon this.options = []; // Initialize options
    }

    getOptions() {
        return this.options;
    }

    async updateOptions() {
        try {
            const response = await fetch('/api/options');
            if (!response.ok) {
                throw new Error(`HTTP error! status: ${response.status}`);
            }
            const data = await response.json();
            this.options = data.options;
            this.editor.change(); // Update editor view} catch (error) {
            console.error('Failed to get option:', error);
            // Error handling can be added here, such as displaying error prompts}
    }
}

This code first defines a custom component CustomSelectMenu inherited from wangEditor.SelectMenu . The updateOptions method is responsible for asynchronously getting option data and updating this.options . Added error handling and check response.ok after fetch to ensure the request is successful. this.editor.change() method ensures that the editor interface is updated to reflect new options.

Through the above steps, you can implement asynchronous option loading and dynamic updates in SelectMenu of wangEditor v4. If you have any questions, please feel free to ask.

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