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Read our original AirPods Max review.
。关于这个话题，夫子提供了深入分析
豆包回应「手机助手存在安全漏洞」：黑公关
We now maintain an index variable. Previously, the cursor was always at the right-end of the input, since you couldn't use arrow keys to move it left, and new input was always appended at the right-end. Now, we need to keep a separate index which is not necessarily at the end of the input, and when a user enters a character we splice it into the input in the correct location.