Super simple js templating

templatize.coffee

# Regex for ONE optional whitespace.
# NOTE: Replace `?` with `*` to make it more lenient.
nbsp = '[\\s\\xA0]\?'

templatize = (str, context) ->
    # If no object just return string.
    if not context or typeof context isnt 'object'
        return str

    # Loop through keys and replace placeholders.
    for key of context
        # Max ONE whitespace on either end.
        # E.g. matches {{foo}}, {{ foo}} and {{ foo }}, but
        # not {{  foo  }} or {{  foo}}.
        re = new RegExp("{{#{nbsp}#{key}#{nbsp}}}", 'g')
        str = str.replace re, context[key]
        return

    return str