Two Leaflet copies on one page break map.remove()

• Uncaught TypeError: map.remove is not a function at MapPanel.destroy (MapPanel.vue:88).
• window.L.version prints 1.7.1 while the bundled module reports 1.9.4.
• window.L.Map === importedL.Map is false, and marker icons change style once the second copy loads.

1. Print L.version from the console and the version declared in package.json.
2. Search the HTML for additional leaflet.js script tags.
3. Compare class identity between window.L and the imported module.
4. Check whether the map renders but its methods fail.

Keep exactly one copy by declaring leaflet as a rollup external with globals { leaflet: 'L' } (or webpack externals), or remove the CDN tag and import from npm, assigning window.L only once.

Uncaught TypeError: map.remove is not a function
    at MapPanel.destroy (MapPanel.vue:88)

Uncaught TypeError: layer.addTo is not a function

console.log('global L', window.L && window.L.version);
console.log('bundle L', importedL.version);
console.log('同一个类？', window.L.Map === importedL.Map);   // false

• Setting window.L = importedL while the CDN copy is already loaded replaces the global but leaves existing map instances on the old classes.
• Bundling Leaflet twice and only deduplicating the CSS leaves the JavaScript class duplication intact.