+ 1

Canvas type error

This is my code <html> <head></head> <body> <canvas id="canvas1" width="1000" height="1000"> </canvas> <script> var c=document.getElementById("canvas1"); var ctx=c.getContext("2d"); ctx.fillRect(20,20,100,100); </script> </body> </html> When I try to run it I get a type error "null not an object (evaluating 'c.getContext')

html java canvas web typeerror

26th Feb 2018, 2:52 PM

Jack Leonard

1 Odpowiedź

+ 5

Write the whole script tag outside the body tag. Or write everything in a function like this: window.onload =function(){ // code } This is because JS loads before the DOM tree so when JS is loaded, canvas is undefined

26th Feb 2018, 4:17 PM

Gami