Is it possible to use string indexes with jQuery each method in Typescript?

When running a jQuery loop in Typescript, I encountered an issue where the index was being reported as a string.

$.each(locations, (index, marker) => {

    if(this.options && this.options.bounds_marker_limit) {
        if(index <= (this.options.bounds_marker_limit - 1)) this.bounds.extend(position);
    } else {
        this.bounds.extend(position);
    }
});

This resulted in Typescript reporting

An error stating: Operator '<=' cannot be applied to types 'string' and 'number'.

This error specifically points to the line

if(index <= (this.options.bounds_marker_limit - 1)) this.bounds.extend(position);
.

After attempting (index as number), the new report is

Error: Type 'string' cannot be converted to type 'number'

I am seeking advice on how to resolve this situation. Any suggestions?

Answer №1

Consider using the parseInt() function:

if(parseInt(index) <= (this.options.bounds_marker_limit - 1))

You can also approach it this way:

locations.each((index: number, elem: Element): void => {
   // index variable is of type number
})

Based on the jQuery typescript declaration file, it should look like this:

each(func: (index: number, elem: Element) => any): JQuery;

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