Ubuntu reactjs

You can make use of ES6's async/await-feature!

To use await, it needs to be in a function/expression...

add an = in front of your value:

$(function() {
    $('#next_nav').click(function() {
       $('#nav').css('margin-left', '-=10px');
    });
});

There is a way to 'force' the injection of your local Javascript files from local assets (e.g., assets/js/script.js), and to circumvent the 'Not allowed to load local resource :...

It shouldn't. The spec says:

User agents do not generally render elements that appear in the HEAD as content.

See the

$('#book_selection').change(function(){
    var newSelect=document.createElement('select');...