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我收到一個關於陣列中沒有唯一密鑰的每個孩子的警告。通過「地圖」函數調用密鑰
const ITEMS = [
{
"name": "blah", displayName: "Blah!"
"name": "blah1", displayName: "Blah1!"
},
{
"name": "blah2", displayName: "Blah2!"
"name": "blah3", displayName: "Blah3!"
}
]
item: function(i) {
return (
<div key={i.name}>
<h1>{i.displayName}</h1>
</div>
)
}
render: function() {
return (
<div>
{_.chain(ITEMS).map(this.item, this).value()} # I need to pass in a key here?
</div>
)
}
我已經在一個月前發佈了一個類似的問題:"Each child in an array should have a unique key prop" only on first time render of page。在這種情況下,當它調用item()
函數時,我需要通過map
傳遞密鑰。我怎樣才能做到這一點?
謝謝你。不知道'map'會自動傳遞索引。 – patrickhuang94