Templating engines turn a string like Hello {{name}}! into rendered output by replacing placeholders with data.

In this question, implement renderTemplate(template, data), a simplified Mustache-like renderer.

This question is intentionally small:

• Only simple variable tags such as {{name}} and {{ name }} need to be supported.
• data is a flat object of primitive values.
• Missing keys should render as an empty string.
• Inputs are guaranteed valid.

Examples

renderTemplate('Hello {{name}}!', { name: 'Alice' });
// 'Hello Alice!'

renderTemplate('{{greeting}}, {{name}}!', {
  greeting: 'Hi',
  name: 'Sam',
});
// 'Hi, Sam!'

Whitespace inside tags should be ignored.

renderTemplate('{{ count }} items left', { count: 3 });
// '3 items left'

Missing keys should render as empty strings.

renderTemplate('Hello {{name}} {{surname}}!', { name: 'Alice' });
// 'Hello Alice !'

Arguments

renderTemplate(template, data) accepts the following arguments:

Returns

Returns a new string with all placeholders replaced.

Notes

• false, 0, and '' are valid values and should still render.
• Resolved null and undefined values should render as an empty string.
• You do not need to support nested paths, sections, or malformed templates in this question.