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fix(eslint-plugin): [no-inferrable-types] ignore optional properties #918

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merged 1 commit into from Aug 29, 2019
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fix(eslint-plugin): [no-inferrable-types] ignore optional properties #918

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2 changes: 1 addition & 1 deletion packages/eslint-plugin/src/rules/no-inferrable-types.ts
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Expand Up @@ -250,7 +250,7 @@ export default util.createRule<Options, MessageIds>({
// Essentially a readonly property without a type
// will result in its value being the type, leading to
// compile errors if the type is stripped.
if (ignoreProperties || node.readonly) {
if (ignoreProperties || node.readonly || node.optional) {
return;
}
reportInferrableType(node, node.typeAnnotation, node.value);
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9 changes: 9 additions & 0 deletions packages/eslint-plugin/tests/rules/no-inferrable-types.test.ts
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Expand Up @@ -123,6 +123,15 @@ ruleTester.run('no-inferrable-types', rule, {
"class Foo { a: number = 5; b: boolean = true; c: string = 'foo'; }",
options: [{ ignoreProperties: true }],
},
{
code: `
class Foo {
a?: number = 5;
b?: boolean = true;
c?: string = 'foo';
}
`,
},
],

invalid: [
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