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[typescript] Constrain props type param appropriately in withStyles, withTheme, withWidth HOCs #11003

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merged 17 commits into from
Apr 17, 2018
Merged

[typescript] Constrain props type param appropriately in withStyles, withTheme, withWidth HOCs #11003

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e1f809d
Rewrite withStyles definition, using Omit
estaub Apr 12, 2018
f488adf
Fix test issues; redesign withTheme, withWidth using Omit also.
Apr 12, 2018
3560ac0
Use preferred style in tests
Apr 13, 2018
8eb517a
Remove another inferrable generic parameter from test.
Apr 13, 2018
175fa49
Remove another inferrable generic parameter from test.
Apr 14, 2018
92bee1b
Make inclusion of WithStyles in the innerComponent's type def optional.
Apr 14, 2018
c01d787
Commit for review and suggestions; DOES NOT COMPILE.
Apr 16, 2018
89d2a60
Redefine with* to remove Omit.
Apr 16, 2018
bcbf701
Bring back explicit generic parameter on union case in test, doc.
Apr 16, 2018
9fbbbc1
Rename withMyStyles back to decorate.
Apr 16, 2018
e66b8ea
Add trailing comma to function params in styling-comparison test.
Apr 17, 2018
0b47fb3
Fix package.json, yarn.lock.
Apr 17, 2018
748af39
Remove newline from typescript doc.
Apr 17, 2018
b24250b
Remove needless Omit imports.
Apr 17, 2018
ac934c1
Remove extra explicit from doc, add trailing semicolon to function
Apr 17, 2018
f1dbf16
Merge branch 'v1-beta' of https://github.com/mui-org/material-ui into…
Apr 17, 2018
ea20df9
Remove comment from styling-comparison.spec.tsx
Apr 17, 2018
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26 changes: 22 additions & 4 deletions src/styles/withStyles.d.ts
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Original file line number Diff line number Diff line change
@@ -1,4 +1,6 @@
import * as React from 'react';
import { WithTheme } from '../styles/withTheme';
import { Omit } from '..';
import { Theme } from './createMuiTheme';

/**
Expand Down Expand Up @@ -28,19 +30,35 @@ export interface WithStylesOptions {

export type ClassNameMap<ClassKey extends string = string> = Record<ClassKey, string>;

export interface WithStyles<ClassKey extends string = string> {
export interface WithStyles<ClassKey extends string = string> extends Partial<WithTheme> {
classes: ClassNameMap<ClassKey>;
theme?: Theme;
}

export interface StyledComponentProps<ClassKey extends string = string> {
classes?: Partial<ClassNameMap<ClassKey>>;
innerRef?: React.Ref<any>;
}

/*
The Omit<P, 'classes'> below (rather than the canonical Omit<P, WithStyles<ClassKey>>)
is used to allow interoperability with withTheme, which may provide the 'theme' prop.
*/
/*
export default function withStyles<ClassKey extends string>(
style: StyleRules<ClassKey> | StyleRulesCallback<ClassKey>,
options?: WithStylesOptions,
): <P extends WithStyles<ClassKey>>(
component: React.ComponentType<P>,
) => React.ComponentType<Omit<P, 'classes'> & StyledComponentProps<ClassKey>>;
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I think there's some merit here, but P should not be required to included a classes prop. Instead it should be required that if P does include a classes prop, it should have the right type. Something like this:

interface MaybeWithStyles extends Partial<WithStyles<ClassKey>> {
  [k: string]: any;
}

export default function withStyles<ClassKey extends string>(
  style: StyleRules<ClassKey> | StyleRulesCallback<ClassKey>,
  options?: WithStylesOptions,
): <P extends MaybeWithStyles<ClassKey>>(
  component: React.ComponentType<P & WithStyles<ClassKey>>,
) => React.ComponentType<Omit<P, 'classes'> & StyledComponentProps<ClassKey>>;

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That looks great! Let me check it out a bit.

*/
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Let's get rid of this instead of commenting out.


interface MaybeWithStyles<ClassKey extends string> extends Partial<WithStyles<ClassKey>> {
[k: string]: any;
}
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@pelotom pelotom Apr 14, 2018 •
edited

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How about making a reusable version of this,

type ConsistentWith<O> = Partial<O> & Record<string, any>;

which can then be used for withStyles, withWidth and withTheme:

P extends ConsistentWith<WithStyles<ClassKey>>
P extends ConsistentWith<WithWidthProps>
P extends ConsistentWith<WithTheme>

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Missing semicolon


export default function withStyles<ClassKey extends string>(
style: StyleRules<ClassKey> | StyleRulesCallback<ClassKey>,
options?: WithStylesOptions,
): <P>(
): <P extends MaybeWithStyles<ClassKey>>(
component: React.ComponentType<P & WithStyles<ClassKey>>,
) => React.ComponentType<P & StyledComponentProps<ClassKey>>;
) => React.ComponentType<Omit<P, 'classes'> & StyledComponentProps<ClassKey>>;
7 changes: 4 additions & 3 deletions src/styles/withTheme.d.ts
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Original file line number Diff line number Diff line change
@@ -1,11 +1,12 @@
import { Theme } from './createMuiTheme';
import { Omit } from '..';

export interface WithTheme {
theme: Theme;
}

declare const withTheme: () => <P>(
component: React.ComponentType<P & WithTheme>,
) => React.ComponentClass<P>;
declare const withTheme: () => <P extends WithTheme>(
component: React.ComponentType<P>,
) => React.ComponentClass<Omit<P, keyof WithTheme>>;
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Similarly, this shouldn't require P to contain theme...


export default withTheme;
7 changes: 4 additions & 3 deletions src/utils/withWidth.d.ts
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
import { Breakpoint } from '../styles/createBreakpoints';
import { Omit } from '..';

export interface WithWidthOptions {
resizeInterval: number;
Expand All @@ -22,6 +23,6 @@ export function isWidthUp(

export default function withWidth(
options?: WithWidthOptions,
): <P>(
component: React.ComponentType<P & WithWidthProps>,
) => React.ComponentClass<P & Partial<WithWidthProps>>;
): <P extends WithWidthProps>(
component: React.ComponentType<P>,
) => React.ComponentClass<Omit<P, keyof WithWidthProps> & Partial<WithWidthProps>>;
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Similarly, this shouldn't require P to contain width:

export default function withWidth(
  options?: WithWidthOptions,
): <P extends Partial<WithWidthProps> & Record<string, any>>(
  component: React.ComponentType<P & WithWidthProps>,
) => React.ComponentClass<Omit<P, keyof WithWidthProps> & Partial<WithWidthProps>>;

With all of these HOCs we want to enable this kind of pattern:

const Component = withWidth()<{
  // shouldn't need to specify width here; it's a given
  name: string
}>(({ width, name }) =>
  <div style={{ width }}>hello, {name}</div>
);

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Yeah, I wondered about those two, should have hit them. I'll add a couple of tests, too.

2 changes: 1 addition & 1 deletion test/typescript/components.spec.tsx
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Expand Up @@ -718,7 +718,7 @@ const TableTest = () => {
);
}

return withStyles(styles)<{}>(BasicTable);
return withStyles(styles)(BasicTable);
};

const TabsTest = () => {
Expand Down
2 changes: 1 addition & 1 deletion test/typescript/styles.spec.tsx
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Expand Up @@ -57,7 +57,7 @@ const ComponentWithChildren: React.SFC<WithStyles<ComponentClassNames>> = ({
children,
}) => <div className={classes.root}>{children}</div>;

const StyledExampleThree = withStyles(styleRule)<{}>(ComponentWithChildren);
const StyledExampleThree = withStyles(styleRule)(ComponentWithChildren);
<StyledExampleThree />;

// Also works with a plain object
Expand Down
2 changes: 1 addition & 1 deletion test/typescript/styling-comparison.spec.tsx
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Expand Up @@ -35,7 +35,7 @@ const DecoratedClass = decorate(
},
);

const DecoratedNoProps = decorate<{}>(
const DecoratedNoProps = decorate(
class extends React.Component<WithStyles<'root'>> {
render() {
return <Typography classes={this.props.classes}>Hello, World!</Typography>;
Expand Down