js how to get file name code example
Example 1: javascript - get the filename and extension from input type=file
//Use lastIndexOf to get the last \ as an index and use substr to get the remaining string starting from the last index of \
function getFile(filePath) {
return filePath.substr(filePath.lastIndexOf('\\') + 1).split('.')[0];
}
function getoutput() {
outputfile.value = getFile(inputfile.value);
extension.value = inputfile.value.split('.')[1];
}
<input id='inputfile' type='file' name='inputfile' onChange='getoutput()'><br>
Output Filename <input id='outputfile' type='text' name='outputfile'><br>
Extension <input id='extension' type='text' name='extension'>
Example 2: javascript - get the filename and extension from input type=file
//Use lastIndexOf to get the last \ as an index and use substr to get the remaining string starting from the last index of \
function getFileNameWithExt(event) {
if (!event || !event.target || !event.target.files || event.target.files.length === 0) {
return;
}
const name = event.target.files[0].name;
const lastDot = name.lastIndexOf('.');
const fileName = name.substring(0, lastDot);
const ext = name.substring(lastDot + 1);
outputfile.value = fileName;
extension.value = ext;
}
<input id='inputfile' type='file' name='inputfile' onChange='getFileNameWithExt(event)'><br>
Output Filename <input id='outputfile' type='text' name='outputfile'><br>
Extension <input id='extension' type='text' name='extension'>