Question

我目前有一个ajax请求，它在提交时填充表单数据。我想进行调整，以便在表单字段（例如：ordernum）输入值时填充它。我试图调整编码以执行onChange但只是出错。

 function get_data() {
        // stop the form submitting
       // event.preventDefault();

        // grab the ID and send AJAX request if not (empty / only whitespace)
        var ID = this.elements.ordernum.value;
        if (/\S/.test(ID)) {
            ajax_request(this.action, {"action" : "fetch", "ordernum" : ID}, process_response);
        }
        else {
            alert("No ID supplied");
        }
    }

    // encapsulate the lot within a function scope called on document ready
    window.addEventListener("DOMContentLoaded", function() {

        // hook the submit action on the form

    var frm = document.getElementById("quick-form");
     frm.addEventListener("submit", frm_submit, false);

    /**
    * function to handle form submit, and request data from server
    * @param {Event} event
    */
    function frm_submit(event) {
        // stop the form submitting
        event.preventDefault();

        // grab the ID and send AJAX request if not (empty / only whitespace)
        var ID = this.elements.ordernum.value;
        if (/\S/.test(ID)) {
            ajax_request(this.action, {"action" : "fetch", "ordernum" : ID}, process_response);
        }
        else {
            alert("No ID supplied");
        }
    }
... blah ...
}

Answer 1

根据您提供给我们的所有信息，我重新创建了以下内容。没有错误。它们必须在您未向我们展示的代码中的某处出现。

///// This is a dummy, simulating what you may have there in real.

function ajax_request(a, b, c) {
  setTimeout(c, 500);
}


function process_response() {
  alert('Hurray!');
}

///// The original code (only reformated)

function get_data() {
  // stop the form submitting
  // event.preventDefault();

  // grab the ID and send AJAX request if not (empty / only whitespace)
  var ID = this.elements.ordernum.value;
  if (/\S/.test(ID)) {
    ajax_request(this.action, {"action" : "fetch", "ordernum" : ID}, process_response);
  } else {
    alert("No ID supplied");
  }
}

// encapsulate the lot within a function scope called on document ready
window.addEventListener("DOMContentLoaded", function() {

  // hook the submit action on the form

  var frm = document.getElementById("quick-form");
  frm.addEventListener("submit", frm_submit, false);

  /**
    * function to handle form submit, and request data from server
    * @param {Event} event
    */
  function frm_submit(event) {
    // stop the form submitting
    event.preventDefault();
    // grab the ID and send AJAX request if not (empty / only whitespace)
    var ID = this.elements.ordernum.value;
    if (/\S/.test(ID)) {
      ajax_request(this.action, {"action" : "fetch", "ordernum" : ID}, process_response);
    } else {
      alert("No ID supplied");
    }
  }
});

<form id="quick-form">
  <input type="text" name="ordernum" />
  <button type="submit">Submit</button>
</form>

如何在字段退出时运行ajax请求？

1 个答案: