<p>我正在尝试创建一个设置，在这个设置中，您可以输入邮政编码，提交表单，然后使用JavaScript检查邮政编码的前4个字符是否与某些JSON数据中的邮政编码匹配，如果匹配，则更改页面上的价格。这将用于Shopify网站，因此如果有关如何在其中实施它的任何帮助，将会很好。</p> <p>目前，当我提交表单时，页面会刷新，但没有任何反应。</p> <p>以下是我目前所拥有的，还处于早期阶段：</p> <p><br /></p> <pre class="brush:js;toolbar:false;">async function checkZones() { // const requestURL = "{{ 'zones.json' | asset_url }}"; // const request = new Request(requestURL); //const response = await fetch(request); // const zones = await response.json(); const zones = [{ "name": "zone 1", "postcodes": [ "test1", "test2", "test3", "test4", "test5", "test6", "test7", "test8", "test9", "test10" ], "cost": 10.8 }, { "name": "zone 2", "postcodes": [ "test12", "test13", "test14", "test15", "test16", "test17", "test18", "test19", "test18", "test19", "test20" ], "cost": 16.8 } ] console.log(zones); updatePrice() } function updatePrice(zone) { const postcodeFormInput = document.querySelector('#postcodeForm input[type="text]"'); const postcodes = zone.postcodes; for (const code of postcodes) { if (postcodeFormInput.value.contains(code)) { const productPrice = document.querySelector('#ProductPrice-product-template').textContent; if (code === "test1") { const newPrice = productPrice + zone.cost; document.querySelector('#ProductPrice-product-template').innerHTML = newPrice; } } } }</pre> <pre class="brush:html;toolbar:false;">&lt;form onsubmit="checkZones()" id="postcodeForm"&gt; &lt;input type="text"&gt; &lt;button type="submit"&gt;Update Costs&lt;/button&gt; &lt;/form&gt;&lt;span id="ProductPrice-product-template"&gt;0.00&lt;/span&gt;</pre> <p><br /></p>

const checkZones = () => {
  // 这里是一个更简单的fetch
  //fetch("{{ 'zones.json' | asset_url }}")
  // .then(response => response.json())
  // .then(zones => updatePrice(zones));
  updatePrice(zones)
}
const postcodeFormInput = document.querySelector("#postcodeForm input[type=text]");
const productTemplate = document.getElementById('ProductPrice-product-template');
const updatePrice = (zones) => {

  const postCode = postcodeFormInput.value;
  console.log("Input",postCode)
  const cost = +zones.find(({postcodes}) => postcodes.includes(postCode))?.cost; // 如果未找到则为0
  
  if (!cost) return; // 未找到
  const productPrice = +productTemplate.textContent;
  const newPrice = productPrice + cost;
  productTemplate.innerHTML = newPrice;
};

document.getElementById("postcodeForm").addEventListener("submit", (e) => {
  e.preventDefault(); // 停止提交
  checkZones()
})

<form id="postcodeForm">
  <input type="text">
  <button type="submit">更新成本</button>
</form>
<span id="ProductPrice-product-template">0.00</span>







<script>
// 测试数据，在取消注释fetch时将其删除
const zones = [{ "name": "zone 1", "postcodes": [ "test1", "test2", "test3", "test4", "test5", "test6", "test7", "test8", "test9", "test10" ], "cost": 10.8 }, { "name": "zone 2", "postcodes": [ "test12", "test13", "test14", "test15", "test16", "test17", "test18", "test19", "test18", "test19", "test20" ], "cost": 16.8 } ];
</script>