migrate aio to eslint as tslint has been deprecated, the migration is restricted to the aio app and
its e2e tests and does not include the other tools, for such reason both tslint and codelyzer have not
been removed (to be done in a next PR)
some minor tweaks needed to be applied to the code so that it would adhere to the new ESLinting behaviour
most TSLint rules have been substituted with their ESLint equivalent, with some exceptions:
* [whitespace] does not have an ESLint equivalent (suggested to be handled by prettier)
* [import-spacing] does not have an ESLint equivalent (suggested to be handled by prettier)
* [ban] replaced with [no-restricted-syntax] as there is no (official/included) ESLint equivalent
some rules have minor different behaviours compared to their TSLint counterparts:
* @typescript-eslint/naming-convention:
- typescript-eslint does not enforce uppercase for const only.
* @typescript-eslint/no-unused-expressions:
- The TSLint optional config "allow-new" is the default ESLint behavior and will no longer be ignored.
* arrow-body-style:
- ESLint will throw an error if the function body is multiline yet has a one-line return on it.
* eqeqeq:
- Option "smart" allows for comparing two literal values, evaluating the value of typeof and null comparisons.
* no-console:
- Custom console methods, if they exist, will no longer be allowed.
* no-invalid-this:
- Functions in methods will no longer be ignored.
* no-underscore-dangle:
- Leading and trailing underscores (_) on identifiers will now be ignored.
* prefer-arrow/prefer-arrow-functions:
- ESLint does not support allowing standalone function declarations.
- ESLint does not support allowing named functions defined with the function keyword.
* space-before-function-paren:
- Option "constructor" is not supported by ESLint.
- Option "method" is not supported by ESLint.
additional notes:
* the current typescript version used by the aio app is 4.3.5, which is not supported by typescript-eslint (the supported
versions are >=3.3.1 and <4.3.0). this causes a warning message to appear during linting, this issue should
likely/hopefully disappear in the future as typescript-eslint catches up
* The new "no-console" rule is not completely equivalent to what we had prior the migration, this is because TSLint's "no-console"
rule let you specify the methods you did not want to allow, whilst ESLint's "no-console" lets you specify the methods that you do
want to allow, so and in order not to have a very long list of methods in the ESLint rule it's been decided for the time being
to simply only allow the "log", "warn" and "error" methods
* 4 dependencies have been added as they have been considered necessary (see: https://github.com/angular/angular/pull/42820#discussion_r669978232)
extra:
* the migration has been performed by following: https://github.com/angular-eslint/angular-eslint#migrating-an-angular-cli-project-from-codelyzer-and-tslin
* more on typescript-eslint at: https://github.com/typescript-eslint/typescript-eslint
PR Close#42820
Previously, the max width of the `file-not-found` page was limited to
50rem (800px by default). This allowed little space for showing
potentially helpful search results, which are shown in columns).
This commit increases the max width of the `file-not-found` page to
84rem (1344px by default) to allow search results to be visible without
requiring scrolling. This will not negatively affect UX, because the
page uses a multi-column layout and therefore there will rarely be long
lines of text to scan.
PR Close#41275
* fix(aio): allow code blocks to clear floated images
Previously the negative margin on the code headings were causing
floated images to overlay the start of a code block. Now all code block
successfully clear all floated elements.
* feat(aio): add a `.clear` class for clearing floating images
* fix(aio): tidy up image styles
The css rules for `img.right` and `img.left` allow authors easy
access to floating an image on the left or right, respectively.
The `.image-display` rule which was always found on a figure
has been simplified so that all figures have this styling. It is very
unlikely that a figure will be used outside the content area; and
at this time it seems like `figure` is as good an indicator that we
want this kind of styling as anything.
Now that images are all tagged with width and height values, we cannot
assume to modify these dimensions via CSS as it can cause the image to
lose its correct proportions. Until we find a better solition we must set
`height` to `auto` when the screen width is below 1300px to ensure that
these images maintain their proportions as they get shrunk to fit.
* docs(aio): general tidy up of image HTML in guides
Previously, the guides have a lot of inline image styling and unnecessary
use of the `image-display` css class.
Images over 700px are problematic for guide docs, so those have been given
specific widths and associated heights.
* docs(aio): use correct anchor for "back to the top" link
The `#toc` anchor does not work when the page is
wide enough that the TOC is floating to the side.
* build(aio): add `#top-of-page` to path variants for link checking
Since the `#top-of-page` is outside the rendered docs
the `checkAnchorLinks` processor doesn't find them
as valid targets for links.
Adding them as a `pathVariant` solves this problem
but will still catch links to docs that do not actually exist.
* fix(aio): ensure that headings clear floated images
* fix(aio): do not force live-example embedded image to 100% size
This made them look too big, generally. Leaving them with no size means
that they will look reasonable in large viewports and switch to 100% width
in narrow viewports.
Now if you specifically provide an empty `@title` tag
for a contents file, the doc-gen will not complain and
the browser will just display a reasonable default.
dario-piotrowicz
codebriefcase
George Kalpakas
Peter Bacon Darwin
Stefanie Fluin