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Avoid TypeError when mapper is undefined #2167

Merged
merged 2 commits into from Jan 10, 2020
Merged

Avoid TypeError when mapper is undefined #2167

merged 2 commits into from Jan 10, 2020

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harigopal
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A ternary operation in the prism-custom-class.js file needs to be wrapped with parentheses for it to be evaluated properly. In it's current form, it's throwing a TypeError.

let a = "foo";
let b = undefined;
let c = "default";
a + b ? b() : c;
// Uncaught TypeError: b is not a function
a + (b ? b() : c);
// "foodefault"

harigopal added a commit to pupilfirst/pupilfirst that referenced this pull request Jan 9, 2020
This was done using a yarn "rejuvenation" script:
https://gist.github.com/pftg/fa8fe4ca2bb4638fbd19324376487f42

This avoid CVE-2019-10747 in the set-value package.

I was also forced to fork the PrismJS library to fix a bug related
to improper use of the ternary operator in one of its plugins. I've
submitted a PR for that: PrismJS/prism#2167
mahesh-krishnakumar pushed a commit to pupilfirst/pupilfirst that referenced this pull request Jan 9, 2020
This was done using a yarn "rejuvenation" script:
https://gist.github.com/pftg/fa8fe4ca2bb4638fbd19324376487f42

This avoid CVE-2019-10747 in the set-value package.

I was also forced to fork the PrismJS library to fix a bug related
to improper use of the ternary operator in one of its plugins. I've
submitted a PR for that: PrismJS/prism#2167
@mAAdhaTTah mAAdhaTTah requested review from RunDevelopment and removed request for RunDevelopment January 9, 2020 12:54
@mAAdhaTTah
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Thanks for the PR! Make sure you run gulp to rebuild the files & commit them.

@RunDevelopment This seems like enough of an issue that we should consider cutting another release soon. Thoughts?

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LGTM;

But please run our build process npm ci && npx gulp.

@RunDevelopment
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@mAAdhaTTah I agree. I'll get the changelog ready.

Maybe we could set up a tsconfig.json, so TSC can catch these null/undefined errors, so it won't happen again. After all, it's the second time this happened to me (#2106).

@RunDevelopment RunDevelopment merged commit 543f04d into PrismJS:master Jan 10, 2020
@harigopal harigopal deleted the patch-1 branch January 10, 2020 18:39
@harigopal harigopal restored the patch-1 branch January 10, 2020 18:43
@harigopal harigopal deleted the patch-1 branch February 26, 2020 09:50
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3 participants