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Defects/issue 3878 #3880

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merged 3 commits into from
Dec 6, 2022
Merged

Defects/issue 3878 #3880

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c7471f1
Fixed the issue that theme-switch does not work on docs.
MrCoder Dec 3, 2022
a1e4ffb
Fixed an issue that diagrams disappear from docs pages when switching…
MrCoder Dec 3, 2022
7a08689
Made mermaidConfig a local variable so that it cannot be shared cross…
MrCoder Dec 6, 2022
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20 changes: 13 additions & 7 deletions packages/mermaid/src/docs/.vitepress/theme/Mermaid.vue
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Original file line number Diff line number Diff line change
Expand Up @@ -20,11 +20,6 @@ const props = defineProps({
const svg = ref(null);
let mut = null;

const mermaidConfig = {
securityLevel: 'loose',
startOnLoad: false,
};

onMounted(async () => {
mut = new MutationObserver(() => renderChart());
mut.observe(document.documentElement, { attributes: true });
Expand Down Expand Up @@ -58,9 +53,20 @@ onUnmounted(() => mut.disconnect());
const renderChart = async () => {
console.log('rendering chart' + props.id + props.graph);
const hasDarkClass = document.documentElement.classList.contains('dark');
mermaidConfig.theme = hasDarkClass ? 'dark' : 'default';
const mermaidConfig = {
securityLevel: 'loose',
startOnLoad: false,
theme: hasDarkClass ? 'dark' : 'default',
};

console.log({ mermaidConfig });
svg.value = await render(props.id, decodeURIComponent(props.graph), mermaidConfig);
let svgCode = await render(props.id, decodeURIComponent(props.graph), mermaidConfig);
// This is a hack to force v-html to re-render, otherwise the diagram disappears
// when **switching themes** or **reloading the page**.
// The cause is that the diagram is deleted during rendering (out of Vue's knowledge).
// Because svgCode does NOT change, v-html does not re-render.
// This is not required for all diagrams, but it is required for c4c, mindmap and zenuml.
const salt = Math.random().toString(36).substring(7);
svg.value = `${svgCode} <span style="display: none">${salt}</span>`;
};
</script>