我有一个自定义文件选择按钮,我添加了一个JavaScript文件,用于在用户选择图像后进行预览。但似乎有些事情是错误的我在上传之后无法预览它。有人可以帮忙吗?感谢。
// HTML
cJSON myvar;
printf("Size of cJSON structure = %u bytes\n",sizeof(myvar));
printf("Size of cJSON elem = %u bytes\n",sizeof(myvar.child));
printf("Size of cJSON elem = %u bytes\n",sizeof(myvar.next));
printf("Size of cJSON elem = %u bytes\n",sizeof(myvar.prev));
printf("Size of cJSON elem = %u bytes\n",sizeof(myvar.string));
printf("Size of cJSON elem = %u bytes\n",sizeof(myvar.type));
printf("Size of cJSON elem = %u bytes\n",sizeof(myvar.valuedouble));
printf("Size of cJSON elem = %u bytes\n",sizeof(myvar.valueint));
printf("Size of cJSON elem = %u bytes\n",sizeof(myvar.valuestring));
// Java Script
<div class="container">
<div class="content">
<div class="box">
<input type='file' accept=".gif,.png,.jpg,.jpeg" name="file-7[]" id="file-7" class="inputfile inputfile-6" data-multiple-caption="{count} files selected" multiple onchange="readURL(this);"/>
<label for="file-7"><span></span> <strong><svg xmlns="http://www.w3.org/2000/svg" width="20" height="17" viewBox="0 0 20 17"><path d="M10 0l-5.2 4.9h3.3v5.1h3.8v-5.1h3.3l-5.2-4.9zm9.3 11.5l-3.2-2.1h-2l3.4 2.6h-3.5c-.1 0-.2.1-.2.1l-.8 2.3h-6l-.8-2.2c-.1-.1-.1-.2-.2-.2h-3.6l3.4-2.6h-2l-3.2 2.1c-.4.3-.7 1-.6 1.5l.6 3.1c.1.5.7.9 1.2.9h16.3c.6 0 1.1-.4 1.3-.9l.6-3.1c.1-.5-.2-1.2-.7-1.5z"/></svg> Choose a Ad…</strong></label>
<img id="blah" src="#" alt="your image" />
<div class = "forms">
<form id="contact_form" action="#" method="POST" enctype="multipart/form-data">
<div class="row">
<input id="submit_button" type="submit" value="Post Ad" />
</form>
</div>
</div>
</div>
</div>
对不好的缩进感到抱歉。