网页react框架输入内容

//react 框架,抖音直播间评论信息,模拟输入案例
aa=document.querySelector("#input-comment-block-id>div:nth-child(1)>span>textarea")

let inputLabel=aa;
let lastValue=inputLabel.value;
inputLabel.value= String("欢迎来到直播间")//输入内容为"欢迎来到直播间",如果是替换符,改为 "s%" 需要加引号
let event = new Event("input", { bubbles: true });
event.simulated = true;
let tracker = inputLabel._valueTracker;
if (tracker) {
            tracker.setValue(lastValue);
            }
            inputLabel.dispatchEvent(event);