我对 javascript 非常陌生,并试图在 Google 电子表格和邮件中使用邮件合并功能。我复制了教程脚本并进行了一些必要的更改(至少我能想到的)。但是当我尝试运行脚本时,我得到了 TypeError: Cannot read property "length" from null。(第 43 行)
上面提到的第 43 行就是下面的 for 循环。有人可以帮我知道要修复什么,以便我可以运行脚本吗?
// Replaces markers in a template string with values define in a JavaScript data object.
// Arguments:
// - template: string containing markers, for instance ${"Column name"}
// - data: JavaScript object with values to that will replace markers. For instance
// data.columnName will replace marker ${"Column name"}
// Returns a string without markers. If no data is found to replace a marker, it is
// simply removed.
function fillInTemplateFromObject(template, data) {
var email = template;
// Search for all the variables to be replaced, for instance ${"Column name"}
var templateVars = template.match(/\$\{\"[^\"]+\"\}/g);
// Replace variables from the template with the actual values from the data object.
// If no value is available, replace with the empty string.
for (var i = 0; i < templateVars.length; ++i) {
// normalizeHeader ignores ${"} so we can call it directly here.
var variableData = data[normalizeHeader(templateVars[i])];
email = email.replace(templateVars[i], variableData || "");
}
return email;
}