open window and inject module

main.mjs

j = "data:text/javascript,"+encodeURIComponent(`console.log("hello from "+import.meta.url)`)

w = window.open("about:blank")
x1 = await w.eval(`import(${JSON.stringify(j)})`)
x2 = await w.eval(`import(${JSON.stringify(j)})`)

w2 = window.open("about:blank")
y1 = await w2.eval(`import(${JSON.stringify(j)})`)
y2 = await w2.eval(`import(${JSON.stringify(j)})`)

console.assert(x1 === x2)
console.assert(y1 === y2)
console.assert(x1 !== y1)