Question

我有一个大型的xml文件，内容如下：

<satellites>
<sat name="NSS 9/Yamal 300K (177.0W)" flags="0" position="-1770">
    <transponder frequency="3792000" symbol_rate="2048000" polarization="1" fec_inner="2" system="1" modulation="1"/>
    <transponder frequency="3987000" symbol_rate="8950000" polarization="1" fec_inner="2" system="0" modulation="1"/>
    <transponder frequency="3999000" symbol_rate="2960000" polarization="1" fec_inner="3" system="0" modulation="1"/>
    <transponder frequency="4055000" symbol_rate="11000000" polarization="0" fec_inner="1" system="1" modulation="1"/>
    <transponder frequency="4099000" symbol_rate="30000000" polarization="1" fec_inner="7" system="1" modulation="1"/>
    <transponder frequency="4163000" symbol_rate="2644000" polarization="1" fec_inner="3" system="1" modulation="1"/>
</sat>
<sat name="AMC 8/18 (139.0W)" flags="0" position="-1390">
    <transponder frequency="4056000" symbol_rate="13250000" polarization="0" fec_inner="3" system="0" modulation="1"/>
</sat>
<sat name="AMC 10 (135.0W)" flags="0" position="-1350">
    <transponder frequency="3780000" symbol_rate="30000000" polarization="0" fec_inner="3" system="1" modulation="2"/>
    <transponder frequency="3820000" symbol_rate="29270000" polarization="0" fec_inner="3" system="0" modulation="1"/>
    <transponder frequency="4080000" symbol_rate="29270000" polarization="1" fec_inner="3" system="0" modulation="1"/>
    <transponder frequency="4136000" symbol_rate="19510000" polarization="0" fec_inner="3" system="0" modulation="1"/>
    <transponder frequency="4149000" symbol_rate="9760000" polarization="0" fec_inner="3" system="0" modulation="1"/>
    <transponder frequency="4180000" symbol_rate="29270000" polarization="0" fec_inner="5" system="0" modulation="1"/>
</sat>
</satellites>

我让用户选择卫星，然后我必须获得所选频率的可用频率。我做的第一部分，但现在我无法通过它的sat属性获取name元素来显示转发器频率列表和其他信息。

这是我的代码：var satellitesData = fileData.find('sat[name='+satName+']');

还尝试了这个：var satellitesData = $(fileData).find('sat[name='+satName+']');

这：var satellitesData = fileData.find('sat[name='+satName+'] > transponder');

而且：var satellitesData = fileData.find('sat[name='+satName+']').innerHTML;

没有任何作用。我做错了什么？

Answer 1

由于您要查找的name属性通常包含空格，因此您需要使用引号将搜索的属性括起来，否则语法将无效。使用querySelector而不是.find使用标准Javascript（.find用于jQuery，或者用于纯Javascript数组，但不能用于Javascript HTMLElements）。

＆＃13;

const satName = "NSS 9/Yamal 300K (177.0W)";
const satellites = document.querySelector('satellites');
const satellitesData = satellites.querySelector('sat[name="' + satName + '"]');
console.log(satellitesData);

＆＃13;

<satellites>
  <sat name="NSS 9/Yamal 300K (177.0W)" flags="0" position="-1770">
    <transponder frequency="3792000" symbol_rate="2048000" polarization="1" fec_inner="2" system="1" modulation="1" />
    <transponder frequency="3987000" symbol_rate="8950000" polarization="1" fec_inner="2" system="0" modulation="1" />
    <transponder frequency="3999000" symbol_rate="2960000" polarization="1" fec_inner="3" system="0" modulation="1" />
    <transponder frequency="4055000" symbol_rate="11000000" polarization="0" fec_inner="1" system="1" modulation="1" />
    <transponder frequency="4099000" symbol_rate="30000000" polarization="1" fec_inner="7" system="1" modulation="1" />
    <transponder frequency="4163000" symbol_rate="2644000" polarization="1" fec_inner="3" system="1" modulation="1" />
  </sat>
  <sat name="AMC 8/18 (139.0W)" flags="0" position="-1390">
    <transponder frequency="4056000" symbol_rate="13250000" polarization="0" fec_inner="3" system="0" modulation="1" />
  </sat>
  <sat name="AMC 10 (135.0W)" flags="0" position="-1350">
    <transponder frequency="3780000" symbol_rate="30000000" polarization="0" fec_inner="3" system="1" modulation="2" />
    <transponder frequency="3820000" symbol_rate="29270000" polarization="0" fec_inner="3" system="0" modulation="1" />
    <transponder frequency="4080000" symbol_rate="29270000" polarization="1" fec_inner="3" system="0" modulation="1" />
    <transponder frequency="4136000" symbol_rate="19510000" polarization="0" fec_inner="3" system="0" modulation="1" />
    <transponder frequency="4149000" symbol_rate="9760000" polarization="0" fec_inner="3" system="0" modulation="1" />
    <transponder frequency="4180000" symbol_rate="29270000" polarization="0" fec_inner="5" system="0" modulation="1" />
  </sat>
</satellites>

＆＃13;

您可以考虑模板文字：

const satellitesData = satellites.querySelector(`sat[name="${satName}"]`);

无法使用它的属性获取xml元素的内部HTML

1 个答案: