Type Error in TypeScript Function Arguments

Resolving TypeScript type errors when using a callback in a render function.

📅 August 4, 2025 at 11:01 AM
Original Question
tehere is a way to update config to not check the Argument of type :

Argument of type '(svgCode: any) => void' is not assignable to parameter of type 'Element'.ts(2345)
Parameter 'svgCode' implicitly has an 'any' type


renderDiagram() {
try {
mermaid.render('diagram', this.mermaidCode, (svgCode) => {
this.diagramContainer.nativeElement.innerHTML = svgCode;
svgPanZoom(this.diagramContainer.nativeElement.querySelector('svg'), {
zoomEnabled: true,
controlIconsEnabled: true,
panEnabled: true,
});
});
} catch (error) {
console.error('Error rendering diagram:', error);
}
}
🤖 AI Answer
To resolve the type error, you need to explicitly define the type of the `svgCode` parameter in the callback function. In this case, it is likely that `svgCode` should have a type of `string` since it represents the SVG markup returned by the `mermaid.render` function. Here's how to update the code: ```typescript renderDiagram() { try { mermaid.render('diagram', this.mermaidCode, (svgCode: string) => { this.diagramContainer.nativeElement.innerHTML = svgCode; svgPanZoom(this.diagramContainer.nativeElement.querySelector('svg'), { zoomEnabled: true, controlIconsEnabled: true, panEnabled: true, }); }); } catch (error) { console.error('Error rendering diagram:', error); } } ``` By specifying `(svgCode: string)`, you inform TypeScript about the expected type, which resolves the error and provides better type safety.
Categories:
programming, web development, typescript,
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