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Lazy-load viz.js

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This commit moves the import of viz.js into a `require.ensure` block,
that is only executed when a graphviz diagram is actually present
in a note. Webpack automatically splits the library into a separate
chunk and loads that on demand.

To ensure that graphviz code-blocks are not treated as normal
code-blocks while the chunk is loading, a corresponding check is added
to `finishView`.

The library is also removed from the Webpack config file, as it only
is used at one place in extra.js, which is handled by Webpack
without any extra config.

Signed-off-by: David Mehren <git@herrmehren.de>
This commit is contained in:
David Mehren 2021-06-06 22:08:27 +02:00
parent 1c023e7881
commit 5b8b76135b
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GPG key ID: 185982BA4C42B7C3
2 changed files with 9 additions and 12 deletions

4
webpack.common.js
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@ -253,7 +253,6 @@ module.exports = {
'expose-loader?exposes=LZString!lz-string',
'flowchart.js',
'js-sequence-diagrams',
'expose-loader?exposes=Viz!viz.js',
'expose-loader?exposes=io!socket.io-client',
'expose-loader?exposes=RevealMarkdown!reveal-markdown',
path.join(__dirname, 'public/js/index.js')
@ -284,7 +283,6 @@ module.exports = {
'expose-loader?exposes=emojify!emojify.js',
'flowchart.js',
'js-sequence-diagrams',
'expose-loader?exposes=Viz!viz.js',
'expose-loader?exposes=RevealMarkdown!reveal-markdown',
path.join(__dirname, 'public/js/pretty.js')
],
@ -318,7 +316,6 @@ module.exports = {
'expose-loader?exposes=emojify!emojify.js',
'flowchart.js',
'js-sequence-diagrams',
'expose-loader?exposes=Viz!viz.js',
'expose-loader?exposes=Reveal!reveal.js',
'expose-loader?exposes=RevealMarkdown!reveal-markdown',
path.join(__dirname, 'public/js/slide.js')
@ -342,7 +339,6 @@ module.exports = {
},
externals: {
'viz.js': 'Viz',
'socket.io-client': 'io',
'jquery': '$',
'moment': 'moment',