ant-design-vue/components/vc-pagination/Options.jsx

import PropTypes from '../_util/vue-types';
import KEYCODE from './KeyCode';
import BaseMixin from '../_util/BaseMixin';

export default {
  mixins: [BaseMixin],
  props: {
    rootPrefixCls: PropTypes.String,
    selectPrefixCls: PropTypes.String,
    changeSize: PropTypes.func,
    quickGo: PropTypes.func,
    selectComponentClass: PropTypes.any,
    current: PropTypes.number,
    pageSizeOptions: PropTypes.array.def(['10', '20', '30', '40']),
    pageSize: PropTypes.number,
    buildOptionText: PropTypes.func,
    locale: PropTypes.object,
    goButton: PropTypes.any,
  },
  data() {
    return {
      goInputText: '',
    };
  },
  methods: {
    defaultBuildOptionText(opt) {
      return `${opt.value} ${this.locale.items_per_page}`;
    },
    handleChange(e) {
      this.setState({
        goInputText: e.target.value,
      });
    },
    go(e) {
      let val = this.goInputText;
      if (val === '') {
        return;
      }
      val = isNaN(val) ? this.current : Number(val);
      if (e.keyCode === KEYCODE.ENTER || e.type === 'click') {
        this.setState({
          goInputText: '',
        });
        this.quickGo(val);
      }
    },
  },
  render() {
    const {
      rootPrefixCls,
      locale,
      changeSize,
      quickGo,
      goButton,
      selectComponentClass: Select,
      defaultBuildOptionText,
    } = this;
    const prefixCls = `${rootPrefixCls}-options`;
    let changeSelect = null;
    let goInput = null;
    let gotoButton = null;

    if (!(changeSize || quickGo)) {
      return null;
    }

    if (changeSize && Select) {
      const Option = Select.Option;
      const pageSize = this.pageSize || this.pageSizeOptions[0];
      const buildOptionText = this.buildOptionText || defaultBuildOptionText;
      const options = this.pageSizeOptions.map((opt, i) => (
        <Option key={i} value={opt}>
          {buildOptionText({ value: opt })}
        </Option>
      ));

      changeSelect = (
        <Select
          prefixCls={this.selectPrefixCls}
          showSearch={false}
          class={`${prefixCls}-size-changer`}
          optionLabelProp="children"
          dropdownMatchSelectWidth={false}
          value={pageSize.toString()}
          onChange={value => this.changeSize(Number(value))}
          getPopupContainer={triggerNode => triggerNode.parentNode}
        >
          {options}
        </Select>
      );
    }

    if (quickGo) {
      if (goButton) {
        if (typeof goButton === 'boolean') {
          gotoButton = (
            <button type="button" onClick={this.go} onKeyup={this.go}>
              {locale.jump_to_confirm}
            </button>
          );
        } else {
          gotoButton = (
            <span onClick={this.go} onKeyup={this.go}>
              {goButton}
            </span>
          );
        }
      }
      goInput = (
        <div class={`${prefixCls}-quick-jumper`}>
          {locale.jump_to}
          <input
            type="text"
            value={this.goInputText}
            onInput={this.handleChange}
            onKeyup={this.go}
          />
          {locale.page}
          {gotoButton}
        </div>
      );
    }

    return (
      <li class={`${prefixCls}`}>
        {changeSelect}
        {goInput}
      </li>
    );
  },
};