Unable To Link An External JavaScript File In Pug Using ChartJS

I want to use ChartJS so I can display charts on my website, but I don't want the JavaScript to be separate from the html. I am using pug (jade) as my view engine which I know is working properly.

First I linked ChartJS in my index.pug file and created my canvas:

html
head
    link(rel='stylesheet', href='/stylesheets/styles.css', type='text/css')
    script(type="text/javascript", 'src'='https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.6.0/Chart.bundle.min.js')
    script(type="text/javascript", 'src'='/javascripts/chart.js')
    title= title
body
    h1= message
    canvas#myChart(width='400', height='400')

Next, In my chart.js file I did: var ctx = document.getElementById("myChart").getContext('2d'); var myChart = new Chart(ctx, { type: 'bar', data: { labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"], datasets: [{ label: '# of Votes', data: [12, 19, 3, 5, 2, 3], backgroundColor: [ 'rgba(255, 99, 132, 0.2)', 'rgba(54, 162, 235, 0.2)', 'rgba(255, 206, 86, 0.2)', 'rgba(75, 192, 192, 0.2)', 'rgba(153, 102, 255, 0.2)', 'rgba(255, 159, 64, 0.2)' ], borderColor: [ 'rgba(255,99,132,1)', 'rgba(54, 162, 235, 1)', 'rgba(255, 206, 86, 1)', 'rgba(75, 192, 192, 1)', 'rgba(153, 102, 255, 1)', 'rgba(255, 159, 64, 1)' ], borderWidth: 1 }] }, options: { scales: { yAxes: [{ ticks: { beginAtZero:true } }] } } });

For some reason, the chart isn't being displayed, however if I use script tags and put the JavaScript directly in the pug file it works fine. I know that the JavaScript file is being linked correctly because I checked it using an alert. Any ideas on why my chart isn't being displayed?

via Undying