ReplaceAll 不替换所有递归 function

Question

I'm using a recursive function that takes a template string like this:

<div class='${classes}'>

and replaces the template literal placeholder ${classes} with valued from an object that looks like this:

{ classes: 'bg-${color} text-${color}', color: 'blue' }

Something to note here is that within the object, there is more template string nesting, hence the reason for the recursive function.

The thing I cannot work out is why the replace all function is only replacing the 1st instance of ${color}, and leaving the second undefined.

Working snippet below:

 function buildTemplate(string) { var matched = false; string = string.replaceAll(/\$\{(.*?)\}/g, function (match, key) { if (match) { matched = true; } const selection = selectors[key]; delete selectors[key]; return selection; }); if (matched) { string = buildTemplate(string); } console.log(string); } let templateString = "<div class='${classes}'>"; const selectors = { classes: 'bg-${color} text-${color}', color: 'blue' } buildTemplate(templateString);

Answer 1

You are deleting selectors , when you need it twice.
Remove line;

// delete selectors[key]

or selection get assigned nothing

No need to delete anything when it's an object that is accessed through a key.