10 examples of 'js set focus' in JavaScript

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setFocus(){//获取焦点
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    if(JMain.JFocusControl)JMain.JFocusControl.lostFocus();
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    this.focus=true;
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    JMain.JFocusControl=this;
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    if(this.onFocus)this.onFocus();
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}

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export function focusInput(element) {
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    if (!element) return;
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    const textNode = findLastTextNode(element);
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    if (textNode) {
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        const range = document.createRange();
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        range.setStart(textNode, textNode.length);
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        range.collapse(true);
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        const selection = window.getSelection();
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        selection.removeAllRanges();
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        selection.addRange(range);
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    }
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    element.focus();
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}

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function inputFocus(obj) {
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	$(obj).click();
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}

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focus() {
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  if (this.lastSelection) this.editor.setSelection(this.lastSelection);
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  else this.root.focus();
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}

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public focus() {
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  const textarea = this.textarea.current
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  if (textarea) {
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    setTimeout(() => {
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      textarea.blur()
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      textarea.focus()
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    })
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  }
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}

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focus() {
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    const el = this._getContainer();
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    if (el) {
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        el.focus();
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    }
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}

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function focus(id) {
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    var inputField = document.getElementById(id);
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    if (inputField != null && jQuery(inputField).is(":text,textarea,:password") &&
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            inputField.value && inputField.value.length != 0) {
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        if (inputField.createTextRange) {
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            var FieldRange = inputField.createTextRange();
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            FieldRange.moveStart('character', inputField.value.length);
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            FieldRange.collapse();
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            FieldRange.select();
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        } else if (inputField.selectionStart ||
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                (inputField.selectionStart != undefined && inputField.selectionStart == '0')) {
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            var elemLen = inputField.value.length;
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            inputField.selectionStart = elemLen;
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            inputField.selectionEnd = elemLen;
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            inputField.focus();
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        }
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    } else if (inputField != null) {
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        inputField.focus();
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    }
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}

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async focus() {
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  await this._frame.focus(this._selector)
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}

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focus () {
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  this._input && this._input.focus()
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}

21
focus() {
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  const self = ReactDOM.findDOMNode(this) as HTMLElement;
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  const input = self.tagName === "INPUT" ? self as HTMLInputElement : self.querySelector("input");
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  console.log(self, input);
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  input.select();
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}