Blocked by CORS policy

[davidjbradshaw]

Trying to upgrade to v3.1, but I am getting the following error:

Access to XMLHttpRequest at 'file:///Users/dave/dev/iframe-resizer/src/iframeResizer.js?_=1550217744050' from origin 'null' has been blocked by CORS policy: Cross origin requests are only supported for protocol schemes: http, data, chrome, https.

I can see this is an issue with the default settings of Chrome, so I added the flags to turn this error off, but that does not appear to be being passed through

puppeteer: {
  args: [
    '--disable-web-security',
    '--allow-file-access-from-files',
    '--user-data-dir=/tmp'
  ]
}

[m-niesluchow]

Following config worked for me:

puppeteer: {
	ignoreDefaultArgs: true,
	args: [
		"--headless",
		"--disable-web-security",
		"--allow-file-access-from-files"
	]
},

[zachelrath]

@davidjbradshaw Did you get this working? Can this issue be closed?

[ossdev07]

Ping @m-niesluchow @davidjbradshaw

I am also facing the same issue after upgrading to grunt-contrib-qunit v3.1, I have added the changes you suggested in my Gruntfile.js but issue still persists.

Could you specify exactly where these flags needed to be specified so that issue could get resolved.

[m-niesluchow]

@ossdev07 I am not working anymore on code, but version was "grunt-contrib-qunit": "^3.1.0" and below is part of configuration.

grunt.initConfig({
...
	qunit: {
		options: {
			puppeteer: {
				ignoreDefaultArgs: true,
				args: [
					"--headless",
					"--disable-web-security",
					"--allow-file-access-from-files"
				]
			},
			timeout: 10000
		},
...

[ossdev07]

@m-niesluchow Thanks for the solution it worked for me.