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_ _ _ Arrays. The content will be initialized to 0. An exception is thrown if the requested number of bytes cannot be allocated. atob overview The WindowBase64.atob() function is used to decode a base-64 encoded data. You can use the window.btoa() method to encode data that may have problems in transit, and after receiving the data, use the window.atob() method to decode the data. For example: you can encode, transmit and decode control characters with values ​​from 0 to 31 in ASCII. For applications targeting Unicode or UTF-8, see this note at Base64 encoding and decoding and this note at window.btoa(). Syntax var decodedData = window.atob(encodedData); Example var encodedData = window.btoa("Hello, world"); // encoding var decodedData = window.atob(encodedData); // decoding
























https://developer.mozilla.org/zh-CN/docs/Web/API/WindowBase64/atob