In ES6 you can use template strings to more easily construct strings:
var person = { name: "Tom", age: 20 };
// Before:
var string = person.name + " is " + person.name + " years old";
// Now:
var string = `${person.name} is ${person.age} years old`;
Template strings also allow you to write multi-line strings:
var string = `This is<br/>
a multi-line string<br/>
without having to use<br/>
any tricks. Pretty userful<br/>
for HTML`
For much more advanced template strings, check out: https://hacks.mozilla.org/2015/05/es6-in-depth-template-strings-2/