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feat: add graceful fallback for unavailable micro frontend components #103

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feat: add graceful fallback for unavailable micro frontend components #103

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34 changes: 34 additions & 0 deletions 1-composition-client-only/team-red/page.js
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Original file line number Diff line number Diff line change
Expand Up @@ -45,6 +45,23 @@ function renderOption(variant) {
</button>
`;
}
function renderMfeFallback(id, teamName) {
const el = document.getElementById(id);
if (!el) return;

el.innerHTML = `
<div style="
padding: 12px;
border: 1px dashed #ccc;
background: #fafafa;
font-family: sans-serif;
margin: 8px 0;
">
<strong>${teamName} service unavailable</strong>
<p>This micro-frontend could not be loaded.</p>
</div>
`;
}

function renderPage() {
const variant = product.variants.find((v) => state.variant === v.sku);
Expand All @@ -59,13 +76,28 @@ function renderPage() {
<green-recos id="reco" sku="${variant.sku}"></green-recos>
`;
}
function checkMicroFrontendAvailability() {
if (!customElements.get('blue-basket')) {
renderMfeFallback('basket', 'Team Blue (Basket)');
}

if (!customElements.get('blue-buy')) {
renderMfeFallback('buy', 'Team Blue (Buy)');
}

if (!customElements.get('green-recos')) {
renderMfeFallback('reco', 'Team Green (Recommendations)');
}
}

function rerender() {
removeListeners();
renderPage();
checkMicroFrontendAvailability();
addListeners();
}


function handleClickOption(e) {
const sku = e.currentTarget.getAttribute('data-sku');
state.variant = sku;
Expand All @@ -87,4 +119,6 @@ function removeListeners() {
}

renderPage();
checkMicroFrontendAvailability();
addListeners();