Format a JavaScript string using placeholders and an object of substitutions?

Question

I have a string with say: My Name is %NAME% and my age is %AGE%.

%XXX% are placeholders. We need to substitute values there from an object.

Answer 1

Here is another way of doing this by using es6 template literals dynamically at runtime.

const str = 'My name is ${name} and my age is ${age}.'
const obj = {name:'Simon', age:'33'}


const result = new Function('const {' + Object.keys(obj).join(',') + '} = this.obj;return `' + str + '`').call({obj})

document.body.innerHTML = result