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8 changes: 7 additions & 1 deletion src/guide/essentials/computed.md
Original file line number Diff line number Diff line change
Expand Up @@ -255,7 +255,13 @@ const fullName = computed({

- 仅 3.4+ 支持

<p class="options-api">
如果需要,可以通过访问计算属性的 getter 的第二个参数来获取计算属性返回的上一个值:
</p>

<p class="composition-api">
如果需要,可以通过访问计算属性的 getter 的第一个参数来获取计算属性返回的上一个值:
</p>

<div class="options-api">

Expand Down Expand Up @@ -317,7 +323,7 @@ export default {
},
computed: {
alwaysSmall: {
get(previous) {
get(_, previous) {
if (this.count <= 3) {
return this.count
}
Expand Down