问题
I have integrated CodeMirror with below code,
<style>
.CodeMirror {
border-top: 1px solid #888;
border-bottom: 1px solid #888;
}
</style>
<body>
<textarea id="myCode"></textarea>
<script type="text/javascript">
window.onload = function() {
var myTextarea = $("#myCode")[0];
editor = CodeMirror.fromTextArea(myTextarea, {
lineNumbers: true
});
};
</script>
</body>
It shows a normal textarea only, which doesn't look like an editor and the line numbers are missing. Please help me if anything I am missing.
When I replace the line var myTextarea = $("#myCode"); with var myTextarea = $("#myCode")[0], it displays the edotor as well.
回答1:
Look at this fiddle.
HTML:
<textarea id="code"></textarea>
JS:
var minLines = 5;
var startingValue = '';
for (var i = 1; i < minLines; i++) {
startingValue += '\n';
}
var editor = CodeMirror.fromTextArea(document.getElementById("code"), {
lineNumbers: true,
gutter: true,
lineWrapping: true,
value: startingValue
});
//FIX FOR MIN LINES
//http://stackoverflow.com/questions/10380759/codemirror-minimum-lines-number
editor.setValue(startingValue);
来源：https://stackoverflow.com/questions/39093796/codemirror-missing-line-numbers-it-shows-a-simple-textarea-only